![]() Before you choose the codec for HTML5, keep in mind only these three are compatible with HTML5. Ogg: Ogg files with Theora video codec and Vorbis audio codec. WebM: WebM files with VP8 video codec and Vorbis audio codec. You will, however, find each Youtube video is encoded using h264 or WebM or MSE, and, once again, this is what your browser is failing to do and what you must troubleshoot, and the steps I've outlined above are the correct first steps to doing so. As of now, the three HTML5 browser supported video codecs are: MP4: MPEG 4 files with H264 video codec and AAC audio codec. If you look into the Stats For Nerds that Chamberlain mentions in his comment above, you will never see HTMLVideoElement listed as the encoding format. So, your browser knows how to handle the container, but it should also know how to handle the encoding formats itself, and that is where your problem lies. The video itself must be encoded in one of several formats, which are the other parts of the picture: h264, WebM, MSE, etc. In the picture you show, the HTMLVideoElement is the code that Youtube uses that the browser knows how to handle, but it doesn't actually encode the video, it's just the container the video is delivered in. HTML 5 is essentially a container, a WAY to deliver video, it is not the video codec itself. Next, if you're still not able to play Youtube videos natively, remove Firefox entirely and then go to and download a fresh copy of the latest version and install it. If Youtube works, you can go through and enable single add-ons at a time, testing each time to make sure video plays correctly. If your Firefox installation does not, please try the following steps:įirst, disable all the add-ons in your browser and try visiting Youtube again. Tyler, as others have mentioned Firefox supports HTML5 video natively.
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