Https://dovetailapp.com/ and https://condens.io/ (both excellent and specifically focused on user research). Source: about 2 years ago

Other options include EnjoyHQ, Aurelius, and Condens. Out of those 3, I tried Condens last year and gave up on it, because the transcription quality was sub-par. When we were considering which tool to use earlier this year, the video montage option and the ability to do the analysis fully from the tool swayed us, and we ended up picking Dovetail. So it really depends on what you want the repository to do, support... Source: over 2 years ago

Look at Condens. We demo’d it last year. I like it a lot as a tool to aid in synthesis. Didn’t end up going with it because it didn’t meet all of our requirements as a team, but I was still very impressed. Source: over 3 years ago

I've used annotate.tv to timestamp youtube videos & comment on whatever's happening. Best is to just watch with your teammates over discord or something though. Source: almost 2 years ago

Maybe your best bet is to upload to YouTube as unlisted and use https://annotate.tv … on iOS I use KMPlayer to add markers (boorkmarks) and use those to annotate once back home. Wish there was something better. Source: about 2 years ago

I use Inoreader, raindrop and hypothesis. I'm trying annotate.tv extension in chrome for youtube videos. Everything syncs to readwise and so into obsidian. Source: almost 3 years ago

A video note-taking app: https://annotate.tv. - Source: Hacker News / about 3 years ago