The hardware it was running on was... Basic at best and the database that backed the whole thing was torched at some point. The sole guy behind it however did manage to get some of it back up and working and launched a patreon to fund it.

The whole story is over here: https://www.theverge.com/2020/4/1/21202658/ytmnd-return-shut...

Thank you! I am so glad it’s back, it’s an absolute treasure trove