just about today or yesterday, YouTube now fully sapport 60fps video. With this we can provide the best and actual quality we actually see and record.. Did some test with PS3 & Vita TV for now
Note:Only Google Chrome, Safari 8 and Internet Explorer 11 are compatible for now, just choose 720p60 or 1080p60 when watching the video
PS3 - Tales of Graces F English
Vita TV #1 - Ys Celceta no Jukai
Vita TV #2 - Ao no Kiseki Evolution
as we can see, the most noticeable smooth is Tales of Graces F of course.. But each game actually have their own fps (frame rate second) some do run at 60fps but most of ps3 games are 30fps.. but consider the current-gen PS4/Xboxone/Wii U run at 60fps for most of games, YouTube really takes a brilliant step