feed url problem

Don’t know if this is your only issue, but you’re using the_title() to build your URI. This ECHOS the title, which is not what you want.

Instead, you should be using get_the_title().

I’d also urlencode the title, as Jan suggested.

Your best bet is to print out the YouTube URI after you build it, then try to hit it in a browser. If the results aren’t right, the problem is with your URI.