You can shorten the link via Bit.ly and write a backslash instead of a forward slash. For example:
Normal: Hey guys, check this link out at bit.ly/getfreegems
Youtube: Hey guys, check this link out at bit.ly\getfreegems
That's a random Bit.ly link, by the way - not mine. 8|
Edit: Didn't think about it when I posted, but you should have posted this thread in the Youtube section. You'd get more answers over there.