There are no tools to sort through subscriptions that I know of. I am subscribed to some channels that put out tons of contents where I usually don't want to watch it, but the stuff that I do want to watch is high priority, channels where everything is priority, and channels where it's content I just want to watch occasionally when it happens to show up and I'm in the mood.
I learned long ago that anything I want to watch more than once should be saved locally when a record label made a group I liked delete all their content to promote a new album, but I need a solution for filtering the one time views.
I wouldn't. Bulk download it all and decide locally.
Not something I'd usually do because it is wasteful and not being a good net citizen but sufficiently annoyed that I'm willing to colour outside the lines here.
[1] https://www.tubearchivist.com/
[2] https://github.com/tubearchivist/tubearchivist-jf-plugin
e.g. lately the thumbnails have a popup overlay that pops into existence at last second over the thumbnail, basically hijacks your click and navigates you away from yt and to a support.google.com page that discusses paid product placement. No google thats not why I clicked on a video thumbnail.