These are not necessarily unpopular in terms of subscribers, but nieche in terms of topics:
- acollierastro: theoretical physicist with a unique style. What got me hooked are her videos debunking or responding to popular scientific misconceptions.
- Ben Eater: teaches computer related subjects like electronics, networking, low level programming, architecture etc. in a fun way. He has a series where he builds a computer from scratch with cables and circuit boards.
- Living Ironically in Europe: if 2balkans4you was a youtube channel, although he has some serious content as well
- Masaman: mostly talks about genetics, he hasn't made any new videos in a while.
- Max Derrat: he seems to have deep knowledge about occult stuff and its history which he uses to analyse video games and other media.
- Ostura Official TV: progressive metal band from Lebanon.