Posted 25 October 2017 - 04:59 AM
Youtube's bandwidth is for sure lower than Vimeo, which is evidenced in why you PAY for Vimeo's services and youtube is free. That's not just advertising, that's because you're paying Vimeo to store your files on their servers because they do take up a lot of space since they're such high bandwidth streaming files.
If I upload the same file to Vimeo and Youtube, the quality difference is noticeable right away. From a 10 bit Pro Res file, it's not overly dramatic unless you play the original against the youtube version, then it's pretty noticble.
For me, I don't really shoot stuff with crushed blacks and I have good encoding software, so it's never a problem. The only "issues" I have are blockiness due to the lower bandwidth and of course color bleeding from the 4:2:0 color compression. Vimeo is still 8 bit 4:2:0, but the color bleeding for some reason is a bit better, probably due to the higher bandwidth.
The files you upload need to be perfect first, so 20Mbps .h264 or .h265 at max quality of source, would be a good start. For Vimeo, I always upload Pro Res LT files as my source. They seem to work the best and you can upload via FTP which is a great feature for larger files. For youtube it's always .h264 @ 15 - 20Mbps and I make them using Apple's compressor software which is really good and the latest version has no bugs related to gamma. I then watch it front to back so when I upload I know there aren't going to be any issues.