Well,

Next, I'd ask you to do an "ls" on the original directory to see if it's empty...

Oh, wait, I did ask that. :-)

If it's already empty and those are the correct directory names (You'd find that out by doing an "ls" :-), you go to the next steps on the directions:
------------------------------------------------------------------
rmdir /home/users/.canola/youtube/videos/

now, just create the link:

ln -s /home/users/.canola/youtube/videos/ /media/mmc1/youtube/
------------------------------------------------------------------

desiv

p.s. Remember to be careful with rm, rmdir and mv. Those commands remove things, so you want to be sure you're removing the right things. Spaces, /'s, .'s, are all very important!!