Is there something that can gather online videos to make a knowledge base?

Hey guys, need help here. Do you know any app or tool that can gather online videos from different platforms (like YouTube, TikTok, Instagram, Facebook, etc.), and drop these videos into folders/categories for quick categorization?

The thing is, I often watch videos on different platforms, also learn things from online videos, and favoriate what I like or think is useful for re-watch. But when I need to find a specific video later, like days or months later, I found it’s so hard, cause I don’t even remember which platform it’s on. So I’m wondering if there’s an app that can gather online videos of different sources into one place, with tag, folder, or categorization function, kinda like a management app for online videos?

Thanks in advance!