@christianselig Lower resolution videos will generally process much, much faster, so if you want to optimize for processing time, I’ve found 720p video processes pretty quickly (it’ll be a bit faster too if you encode based on the YT guidelines - h.264 @ ~7.5 Mbps): https://support.google.com/youtube/answer/1722171?hl=en.

YT seems to always re-encode uploads though, so I usually just live with the processing time and upload prores 422. The quality generally is noticeably better, esp at the higher end of the ladder like 2k/4k.