content: download 4k videos from youtube - no really! Been looking for something that can do this for a really long time and stumbled onto something accidentally! https://www.svp-team.com/wiki/SVPtube#Video_downloading It will monitor your cache for youtube URLs copied, you need to be comfortable defining some variables in a windows script file.  It's not real elegant but it works unlike other things that can't deal with youtube's DASH streaming.