Is it just me?

Dear readers,
 It appears that YouTube doesn't like the format I am uploading my videos with or something, as all of the ones I looked at have the audio screwed up, ie. not in sync, and crackling... Have you experienced this problem when watching my videos of the convention? I just want to make sure it isn't just my computer before I go and re-upload all of those videos...
 Thanks for your input!
   Andrew B.