After installation : seems you don’t restart nginx ? Must restart manually, else have a 404 on subdirectory of main domain.
I don’t look further , but seems there are a problem : i make a quick try with http://www.arte.tv/magazine/28minutes/fr/le-club-28-revisite-lactualite-de-la-semaine-28minutes-0 and https://www.youtube.com/watch?v=W7pLQ8-_l54 . But none of this work ?
I use /download for directory for testing (1st time used /home/me/videos).
It’s just my humble opinion but this www.ytdl.info is about using their API. Maybe they’re nice guys etc. But I’m not sure, so security is a question. And YunoHost is about installing your own server, not a simple limited website, so I’ld just install youtube-dl localy, no need for third party.
I’m not maintaining this package, and p1r0x’s not maintaining the related webui. I’ld advice finding something maintained, or use a web terminal ui to directly use the cli.