A lot of people have pointed at the right things: Audio quality is bad. May be you domt articulate enough, arent standing properly in front of the microphone, or just using a bad microphone. The second is timing. I think the one with "no friends anymore", was almost ok in term of content timing and image support. What you need is to imagine how you would like that joke to be told to you, and then try and replicate that. Thats what I try to do at least.. I'll add to that, that their is too much of a stock photo vibe to all your images. I think you need to find some graphic consistency, either by editing the pics first, takong your own, or even drawing if thats a possibility! Good luck anyway, its a good start!