Vanthomasfromsyd,
I had the same issue but I solved it. What I did was opened up my iTunes account and on the sidebar hit photos. I then unchecked the box that says "Sync Photos" & then a pop up box comes up saying do you want to keep or remove photos from your last backup. Hit REMOVE photos.. and then hit apply on the bottom right. Then SYNC ur iPhone. This removed all of the albums I wasn't able to delete.
For you since its your videos.. just hit the box that says VIDEOS and uncheck *Sync Videos*. and then apply..and sync