Looks like it might be a while before YouTube properly supports H.265/HEVC (which includes x265) since Google is still endorsing VP9 mainly (at present).
As for the new anniversary videos, I haven't decided yet still when I'll host a server (I plan to do it over Tunngle for the time being). I'll reveal the Network Name and Password in due time.
Here are some planned recordings of different versions (instead of livestreaming, so I can fully utilize 60FPS without any interference):
Alpha 1.5 - Yes, I'm doing this version again. This time, with other players. Honestly, this is really the first time I'm going to play it with others since I have mainly played it with siblings or bots in later versions.
Alpha 2.0 - This one will probably last longer due to the excitement of this version. Especially with incredibly long powerstruggles (compared to even the betas).