Realize that five minutes of content (ESPECIALLY content that has to be synced to music) would take a lot of time, even if you do some really simple stuff, and if you want to do anything halfway decent, you're talking a pretty big workload. Fifty dollars for two months of someone's time? I'm sure people would much rather just do it without pressure for fun rather than facing work for pretty much no pay.
~I have no idea what I'm doing~