Some videos on YouTube are uploaded in a high resolution, for example 720p (720 pixels vertical resolution). However, the player window itself is just around 380 pixels high.
When you watch the video in the small player, it doesn't make sense to buffer the high-quality version. You wouldn't see all the pixels anyway.
When you switch to full-screen, notice ...
The issue with the first example is that you are not going straight to the video. Instead of watching as part of a playlist, view the video only:
This is the full URL: http://www.youtube.com/watch?v=KqnB2Ew0SFM Now you'll get all the features supported by HTML5.
The default resolution for small player mode is 360p, while switching to fullscreen will switch to 480p. In order to counter this, click on the resolution symbol and choose a resolution of your desire:
The lower the resolution, the faster it loads. Also once you modify the resolution, this video will stay in that resolution (and keep/continue preloading) ...
Here is an extension that forces Flash on YouTube (tested on 02/05/2015).
Also, to remove the annoying fullscreen message type in the address bar: chrome://plugins/, find: "Adobe Flash Player" and check the box next to Always allowed.
I had this problem but like you lot all the fixes on the web either are payed for or ffmpegsumo.dll always comes back after a period. I have now fixed mine permanently and here is how I did it.
This is for a Windows based Computer
Find the ffmepegsumo.dll you should all know where it is located.
Right click on it and Choose properties then Choose the ...
I found a solution here: https://groups.google.com/forum/#!topic/mozilla.dev.extensions/0ZgKDAFfUDc
Here's how I disabled HTML5 video in Chrome on Windows:
Find the file called ffmpegsumo.dll where Chrome is installed (C:\Program Files (x86)\Google\Chrome\Application\30.xxxxx\ for me)
Worked for me as well, but after a while the html5 player returned. ...
You can use the YouTube Options extension for Chrome:
Update (2014-04-12): the YouTube Options extension for Chrome now costs $2:
"YouTube Options" cost $2.00 per month, below is a copy of the user agreement one has to confirm prior to using it.
This extension is based on a paid subscription model. It costs a flat
fee of $1.99 per month, with half of ...
You can do this by changing the URL with any video.
Simply take the video id (like the KqnB2Ew0SFM above in the 1st answer
and add it after this: http://www.youtube.com/watch_popup?v=
(getting http://www.youtube.com/watch_popup?v=KqnB2Ew0SFM if using that video)
This way, the video takes up your whole screen and is forced to play in HTML5 (well, just ...
I think it's Firefox. This happened to me on Google Chrome, and the grey excalimation mark happened on YouTube, and another site I was watching an anime on. I tried YouTube on Internet Explorer, and it works fine.
I suggest uninstalling and reinstalling Firefox.
To watch iPlayer on a Mac without Flash make it appear that the computer is an iPad.
To do this with Safari web browser turn on the "Develop" menu.
Then select "User Agent>iPad".
The only disadvantage is that the picture is iPad, or smaller, size.
The best advantage of HTML5 of YouTube player is compatibility with Android devices. When the user click the player to watch a video, no need to skip to YouTube App. Just embed and watch the video within the page, no Flash problems. At PresentationTube, we use HTML5 to allow mobile users watch the video within the page the same as the desktop.