Okay, I got it.

I installed OpenSSH Server + Client and logged in to delete the file

/home/user/.mytuberc

mYtube now wanted me to choose a new path

I chose
/home/user/MyDocs(in the device it's called N900)/Youtube(or whatever you want)

Now it starts but I can't watch the videos, it shows the first frame in Mplayer, nothing else
I also applied the patch

edit:rebooted the device and it plays dat shat

I hope that I can heldp others with my post