Ive tested HTML5 and WebM on YouTube for about a month now and it isnt perfect. HTML5 video (WebM)on YouTube looks like the future replacement for Flash but is it really a good thing? I wrote a guest post talking about this on Konnessi if you want to check that out. Not faulting them completely, it is in testing and there are a few known issues. One of these issues is full screen playback. When you try to watch videos in full screen, it only maximizes to fill the window. You can download some extensions to fix this but seeing that this is in testing, I decided to wait full them to roll out a fix. I see no point in installing an extension or fix to have it work in the future. Besides a different playback control, there really isnt anything to brag about. On a good note, video ads are(currently)В not implemented on this new format. This is a Restriction but dont worry. Google say, we are working on this! Please guys, no rush!
As far as functionality, Its pretty much the same except video annotations are not supported. Playback has been fine for a while but then things got ugly. Apparently, there seems to be some sort of memory leak or CPU issue. I would have Chromium opened to a YouTube video and all of a sudden, my computer bogs at 60% CPU usage. VideoВ frame-rateВ then drops significantly and my computer responds just as slow. Killing Chromium doesnt solve this problem. I would have to restart my machine to get it up to speed. I am not used to a slow bogging computer since I left Windows. I have tested this on multipleВ occasionsВ and concluded that it only happens with the HTML5 trial running on YouTube. Isolating the problem, I have decided to leave the trial. Googles move to push WebM seems premature. The format is buggy and every video take about 5 seconds longer to load compared to the normal Flash counterpart. I decide to be fair and try it out but as of right now, its not worth it. I have to restart my computer after watching 5 videos and wait longer to watch them. Are you on the HTML5 trial? What is your experience? If you want to try HTML5 video for yourself, click here to enter the trial.