I have 2 kids and I have my main timeline with both kids. For the birthday of each kid, I do a special video with the highlights since bith. I created 1 timeline for each kid and currently I copy the videos that I want from the main timeline to the kids timeline, which is cumbersome and time consuming. Instead, I'd like to be able to use custom tags for each clip (e.g. 'kid1_favorite') and then when watching filter only the clips with a certain tag.

I know that the star functionallity is similar, but it's not great for this use case because I need to switch from one kid to the other, so I'd need to write down somewhere the clips that have stars, remove them, and mark with stars the other videos, and then when I want to switch do this process again