I use Geddit occasionally, I don’t know if it supports voting or commenting though since I just browse.
Gamescope generally helps with alt+tab issues.
How is Backpack Hero by the way? I played the demo years ago and liked it but haven’t bought the actual game yet.
Yes, every video you download or stream is actually compressed quite a lot, the bitrate just determines how much compression is applied. Higher bitrate means the file is bigger and less compression is done, while low bitrate means the video has a lot less bits to store all that data and so has to do more compression.