Help me please, I know I'm a noob :[

[DeviousBear]

http://i70.photobucket.com/albums/i85/Blo0dLinE/problem-1.gif

How do I convert my videos without getting that error? If it helps anymore, these are youtube videos I'm trying to convert.

[Midiman]

Please read the posting guidelines. Post large pictures of screen grabs of error messages does me absolutely no good.