This is supported by all major browsers for several years now. YouTube also supports VP8/VP9 in the WebM container. Though this is changing with WebM gaining some more support. YouTube only encodes some videos in WebM after they got uploaded and mostly only popular videos (going by the videos I saw encoded in WebM) so it's not certain your video will be present in WebM. WebM was introduced with the HTML5 version of YouTube. WebM is a format developed by Google and was meant as a standard video codec for HTML5, support for it is by now pretty good in most modern browsers. The other codec used is VP8 which is coming in the WebM container format. For 240p YouTube is also using 3gp which is a rather old codec (based on MPEG-4 Part 2 (not to be confused with MPEG4 Part 10 aka h.264) meant for mobile devices (long before the smartphone era), it comes in the container. Though every video below 720p will also have a mp4 version available. Meaning only 360p and 480p will exist in an. flv will only be used for resolutions below 720p. That's the standard and this will happen for every video. Generally, every of your uploaded videos will be encoded in h.264 and will be muxed into an. It depends on the popularity of the video what codecs are used for your video (see below why). YouTube uses 4 container formats and 4 different codecs. Some general info about the formats used: So what codec can I expect my videos to be output in, and if it depends, what does it depend on? Should I adjust my own encoding to "play nice" with Youtube's codec, or does it matter, quality-wise? I know I can throw pretty much anything on Youtube and it will take it, so I'm mostly concerned with video quality.
Considering their amazing compatibility across devices I assume they either use a very common standard or multiple codecs for each video. I'm basically wondering if my codec is going to be preserved or overwritten with H.264 or whatever they use. What codec(s) do they use? As a producer I have an option to download the file as an MP4 however I note a third party downloader (which is extremely shady and crappy) brings the files down as FLV. I know they have a rather zealous processing set up that generates multiple copies of my upload at different resolutions 1080p, 720p and 480p and apparently a mobile one, at the very least. Related to What codecs/formats are appropriate for full motion video recording for youtube? I'm wondering exactly how I can expect Youtube to handle my videos.
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