A good site for CC licensed video overlays?

Does anyone have a recommendation for a site that has video overlays when the available filters aren’t enough for desired effect? I found a KDE tutorial from a few years ago that used an overlay to look like a decades old VHS tape instead of using built in effects. But where should I find them? Because many sites have strings attached and I would like CC0 or CC BY-SA licensed overlays.

Example, this was done via avisynth, a free software program for video modification on the command line (Which in fact is script based, you feed in a simple script of commands instead of directly using a GUI interface. Too bad setting up the dependencies is a pain):

I’d like to achieve a similar look, with an overlay. Maybe in the future integrate avisynth into kdenlive? That’s a thread for another day.

They use an interesting approach (pretending to be an avi to a consumer) - but the future probably looks more like: Vulkan Filters | FFmpeg/FFmpeg | DeepWiki

I did find this, but I’m skeptical on the legal allowance on using random overlays from youtube.