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Parallax implementation guidance like Sony website

I am developing a website using parallax. Just a brief note on what I did so far.
I used the skrollr plugin for generating the parallax effect. With this plugin I was successfully able to move elements with different scroll speeds. However, there are a few major issues I really to resolve.
Given your understanding and guidance I look forward to get through them.
Here is what I am trying to address:
1) The site that I developed is not responsive with parallax. Data attributes for elements are written inline (and thats how so far I think they are written: inline). So because of that even on screen resize, the inline styling of data attributes remains intact. Hence, the responsive stuff for parallax (on desktop version) is not able to produce same effect on mobile versions.
2) I checked the sony website. Link : http://www.sony.com/be-moved/
They have used parallax and the site is responsive.
Parallax websites are based more on the imagery content. So, how does the site load faster when the images are of huge sizes. (Running into MBs). The sony website has very heavy images (size running into MBs). How do images of such heavy sizes load so fast?
3) Again, coming back to the sony website. On scrolling the user is shown various perspectives / angles of sony products. So, how are the multiple perspectives of every product captured for scrolling.
How is such precise sequential image with varying perspective for every product shown on scroll?
Its the entire background image that changes perspective. So, how is that done? Thats not just plain parallax, right?
I am mentioning this site because its implemented in a differenet way from other simple parallax websites. Sony's implementation is what I am interested in!
4) What would be best to do? Changing background images on scroll(like the way its done on sony) or changing the position of single elements using data attributes?. (like its done on www.numero10.ch)
I have been asked to implement parallax in two ways:
a) only move the elements within the background. Like if its a sky image with two clouds on the right. Then just consider moving the two clouds to the left on scroll.
or
b) Have different background images with the two right clouds moving to the left. So, that means I will have a volley of images for just moving the clouds from right to left; with every image having two clouds shifting towards left by pixel positions.
Looking forward for a reply. :)
Thanks for your patient reading.

I think this will lead you to the right direction: https://ihatetomatoes.net/sonys-be-moved-website-deconstructed/
It explains in detail exactly how the Be Moved website is constructed.

2) I believe they use something called "Lazy Loading" which is displaying a "fake" lighter image until all the HTML,CSS,JS is loaded to then load the real images and replace them.
3) That is not mere parallax , they are using the canvas element ( How exactly I don't know but check the page source )
4) It is better to leave an image as a fixed background and work with smaller elements.

I think that site is not just parallax layered scrolling, It is a combination of a sequence of video clips triggered on scrolling. I have not inspected the element of site but I think so. But site is loading tremendously fast compared to other such sites because of your cache in your system and implementation of lighter images in the starting and heavier images at last

Stuttery performance issues with Jquery Mobile and Phonegap

So, I am developing an app using phonegap and jqm. Everything works great and it's all pretty easy thanks to phonegap build. However, I've started to see some 'stutter issues' that are really annoying. My app at the moment only has two pages and the transition effect between them is 'slide'. The first page has a background color set to it and the second one does not. Some of the issues:
When I navigate from page 1 to page 2, half of the page has the background color from the previous page. It goes away after I do some random swipes on screen.
On one of the pages, I have a regular form with some text input fields and a radio button set at the end. When I move from an input box to the radio button the keyboard slides down but it is replaced by a black area for a short period of time.
The fixed header that I have at the top randomly decides to disappear and reappear again.
These are only few of the annoying ones and these only happen on the mobile device and it works fine on the computer. So, I know it's a performance issue.
I've read up about this on the internet and here on SO and different solution have been proposed like writing custom CSS3 transitions (to take advantage of hardware acceleration) or using something like zepto.js.
What in your opinion would be the best 'cross device compatible' method to overcome these? Is there a way to force hardware acceleration with jquery mobile? Is CSS3 performance even across device platforms?
PS. I have been testing on jelly bean 4.2.2. I am not posting any of my code because they are just plain form elements and some input tags and this happens on multiple pages which are totally different so I am pretty sure this isn't code related.
Any help will be much appreciated.

JQuery writes animations using Javascript which dynamically writes inline styles that change quickly. The issue with that, is that it isn't using the hardware acceleration and if you are testing on a retina device, it animates using pixels as they are a unit of measurement. So it is skipping half of your pixels which causes the stutter.
I have written apps using PhoneGap and the best way I came up was to use CSS3 animations/transitions. Super smooth and they feel just like a native app. You will still use JQuery to add/remove classes, etc., but the movement should come from your CSS.

Sliding panel for mobile page

I have a div which is mostly off page but uses translation on hover to display on the main page.
This is my site.
However, on mobile devices this isn't the best solution to display this div. Hover doesn't work well and I have to click often to get it to show up. I'm wondering if it's possible to do it like mobile applications where if I move the page to the right edge enough, this content will display or with a button. Something like this:
Any thoughts on if this is possible or how'd id solve this?

This pattern is called 'Off Canvas layout'. Documented (with some CSS) at http://jasonweaver.name/lab/offcanvas/
There are multiple implementations you could have a look at, perhaps start with this nice demo from Zurb: http://www.zurb.com/playground/off-canvas-layouts
As regards the use of hover, you're better off using a tap/click on both desktop and mobile for consistency. The 3-bar menu button is fairly universally understood these days.

How not to have browser history linked with image clicks using Ad Gallery

I'm working on a site for car classifieds. I searched for an image gallery to display images that users upload for their submissions and found a simple jQuery based gallery called Ad Gallery, which can be found here.
I love the simplicity of the gallery and how compatible it is with most browsers including older IE versions. I also love being able to browse images using right and left arrow keys. Also a nice feature is how it automatically scales wide and tall images to fit the container. These are key features for me.
Here is the problem: clicking each thumbnail, or hitting the arrow key to browse images, counts as a new URL and makes the browser save it in the history. So when the user wants to go back to the main page with submissions, they have to cycle through all the images in a reverse order of how they browsed them. This is a huge inconvenience, especially if they are trying to go back to their search results. I cannot find anything that fixes this in the documentation of the plugin. How can I avoid this problem?

It seems there's a parameter for that : "update_window_hash"
Try that :
$('#myGallery').adGallery({update_window_hash: false});
Not sure at all. Otherwise It seems unsupported.

How do I put a clickable image over a QuickTime video on a web page?

I have a website that runs on WordPress. There is a DIV in the header that contains an embedded QuickTime video (controls are turned off and need to stay like that). I have an image that is supposed to go over the video, and when the user clicks on it, the video should be revealed and play.
I think that if I messed around with the CSS and Javascript for long enough, I could make the image go away and revel the embedded video when clicked on, but I don't know how to make the video start on that same "onclick" event. Another note here: I prefer to use jQuery to do this, since that's what I usually work with. But whatever works works.
This is driving me crazy because I can't find any good information on how to do this! Thank you so much in advance for helping me out.

If you already have a DIV that contains the video, you can create another same-sized DIV that contains your image. Finally, set the image DIV with higher z-index and float it over the video DIV.
I think this should work.

There's really no good way to do this when rendering the video using the QuickTime plugin. Plugins are optimized for performance and typically render above the rest of the "native" elements within your page.
I seem to recall there's a wmode="transparent" attribute or "opaque" that was introduced recently to the plugin similar to what's used with the Flash plugin, but the performance will typically suffer because the plugin renderer will often need to switch to rendering in software as it composites the video with the element you have on top of it, and possibly elements beneath it as well.
The easiest thing to do is to simply use a video element to play the media you want on your page. At that point it is an element like any other on the page and interacts seamlessly with the z-index ordering of positioned elements.
An example of the usage is here: http://dev.opera.com/articles/view/introduction-html5-video/
You may need to nest differently encoded videos as video elements in the page so various user agents with support for different codes can play the video. But just adding the video element and pointing it at your current QuickTime video will work as well as a simple object using the QT plugin.