As I’ve made pretty clear, I’m – among many other things – a YouTuber. I have two YouTube channels, and watch a fair amount of content put out by other creators, too. Whenever I come across a video that seems interesting, I add it to my Watch Later queue, so that I can view it at my leisure. From time to time, I use the “Remove Watched” feature, to remove watched videos from my Watch Later queue in bulk, instead of having to remove them manually.
When I edit videos, I keep meticulous notes on where any third party content comes from, and note it in the description of my video. Even so, I have had copyright claims made against my videos, mostly regarding the music I use. These claims can be obnoxious, though I don’t necessarily agree that there’s any merit to claims that they are scams. At any rate, when a claim is made, you need to file a dispute, detailing where the music is sourced from.