Edit: Check out NihongoTube! It works in a similar way (title filtering) but with more features.
Hey guys. I made a quick chrome plugin (with chatgpt) for hiding the thumbnails of videos on youtube that don't have Japanese characters. It's helped keep me from watching english language videos while on my Japanese immersion account, and I thought some other Japanese learners might find it useful so I'm sharing it here.
It's not on the chrome webstore because I'm too cheap to pay the 5 bucks or whatever, so you can get it on my github. Simply install it in Chrome via the extensions menu.
It's super basic and could be improved, for example by removing the blank space left by hidden videos. Feel free to clone the repo and make changes.
https://github.com/cmjpen/yt-japanese-only
Here's what it looks like on the homepage. Videos are hidden but a placeholder remains. If you hover your mouse over it, it will reveal the video and start playing.
by dnkscrub195