Thanks a lot pragmatist, I'll try each and every step carefully tomorrow.
I can tell you for now that when I execute the tmptube.sh with ./ in front of
it (and being located in my home folder),
the video gets downloaded, and starts in VLC when finished.
The video is inside the tmptube folder (which I created in my home folder).
But it's erased (not even in my trash can) when I close off VLC.
I'll read again tomorrow to see if it's the intended behavior.
On the other hand, when I try to do home/user/tmptube.sh with the URL after
it, I get an error message:
bash:home/user/tmptube.sh: no such file or folder (rough translation).
