i think this is the correct question to ask. did you just create ~/.local/bin folder? you can look at the end of ~/.profile that this will only be added to $PATH if the folder exists.

the easiest way is to log out and log in (no restart necessary!)

otherwise you can also execute source ~/.profile and then yt-dlp should be available.

the chmod +x tip from the other comments could also be necessary!

maybe the installation is simple, but the whole thing is still a beast and has tons of different services and does a lot of stuff. i prefer forgejo because of it’s simplicity (still not super easy) and it takes less resources.