"YouTube did NOT licence H265 (HEVC), it sticks to H264 or worse codecs, so there is in fact a 4K limit."
YouTube doesn't need H265 because Google developed VP9 which it uses to support 4K and above. VP9 is part of WebM. Lightworks supports WebM. There is a WebM plug-in for Premiere Pro. Otherwise, you'll need a ProRes to WebM converter. And, you'll have to find a way to inject the 360 meta-tag into your upload.
If you are are using Safari which only supports h264 you cannot see 4K or greater. Been that way for over a year. Both Chrome and FireFox support VP9. Have no idea if MS Edge does. Doubt it.
More — just for fun!
Boxes like Roku 4K include a VP9 decoder for YouTube 4K. Anything from Amazon — and, I think Apple, — does not.
You also need to check 4K TVs. The Japanese wanted to stay with MPEG LA. Vizeo, for example, c/wouldn't get 4k YouTube. That may have changed.
I suspect you now need to check if a 4K HDR TV will decode a VP9 stream that has YouTube HDR metadata as well as decode H265 with HDR metadata. Hopefully, if both use HR10 they will be the same.
Seems the Japanese have eliminated Dolby from 4K BR. But I think the NHK/BBC HDR is still allowed because I believe that is how 8K will be broadcast in Japan and Korea in 2020. And, it may be used in the USA for 4K OTA — someday in ATSC 3.0.
Best Regards,
Best Regards,
Steve Mullen
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Posted by: "Steve Mullen (DVCinLV)" <dvcinlv@gmail.com>
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