Flicker static when viewing videos with HTML5 on Youtube

Hi Apple support community,
I am looking for advice as to how to proceed with the following experience I have had using Safari to view YouTube videos on my MacBook Retina.
As an attempt to save battery energy on my Mac, I have read that viewing YouTube videos on HTML5 vs. the default flash software will reduce the rate the battery is drained significantly. As such, I have been using HTML5 as the default viewing software for videos on YouTube for over two years now. However, a few months ago I started noticing that now when I watch videos there seems to be black and white static flicker (akin to an analog TV) that lasts for about a second and repeats sporadically during viewing. The audio is not affected at all. I have temporarily switched to reloading the replaying the videos via flash to see whether the same effect was observed, however, there seemed to be no issues when doing so.
I have an inkling that it is a software, as opposed to hardware issue, as this issue is not observed generally on the screen as a permanent fixture, nor does it occur when using any other applications, including viewing streamed videos on other websites. It seems to be localised to YouTube videos using HTML5, as the static occurs within the frame of the video playback screen, as opposed to webpage.
I am wondering whether anyone else has experienced or heard of this, and what recommendations are available for amending this issue, as though it is bearable, it is somewhat unpleasant to sit through.
Kind regards

Are these Windows Media (.wmv) files? If so, check out http://www.flip4mac.com/download.htm
That will allow you to play Windows Media files using QuickTime.

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