Thanks for all your help, I've shot in 1080 @ 50fps and upscaled to 2560x1440 and managed to get the VP09 codec but took another at 1080 @ 50fps rendered at 2048 x 1440 and just got the AVC1 codec, also notice Itchy Boots gets VP09 and then sometimes only AVC1 !!!! doesn't seem to be any consistency from YouTube? But again thanks for your help
Chris
If you're seeing a bigger channel with the AVC1 codec, they probably didn't wait for full processing to complete before publishing... or they uploaded a 1080 video. If Itchy Boots is in a remote location where wifi is spotty or internet is slow, then she may have decided to just render in 1080 to get the video uploaded in a reasonable amount of time.
The other thing could be your own internet connection. YT tries to find the sweet spot between video quality and buffering speed, and if your internet is slow, it'll default to 360, 480, 720, or 1080, even if a higher-res version is available.
I have been rendering at 2.7k for years now, and only had an issue once or twice with a video not processed higher than 1080 [interestingly enough, it was a video about 2.7k, LOL].
-John