I'm having the need of post some screen capture content where some cropping is applied (eg: 850x620) and/or the original monitor resolution is not full hd 1920x1080 but could happen i have to use directly a 1600x900, 1024x768, 1600x1200 and so on.
Uploading videos in h264 but with a video resolution like that will end in a serious quality loss?
What could be a best practice? Give to youtube, vimeo and other services a classic full hd video adding a black frame to match the size or is possible upload a file in native res?
Main goal is keep everything as sharp as possible.