@braindeadr said:

Am I allowed to post my guess for only one of the clips?

You may as well take a crack at guessing at the other ones. You can't win with only one correct clip, so guessing with only one of them before the answer is revealed accomplishes exactly one thing, and nothing else: it gives away one answer to someone else, and that is strongly discouraged.

If you do have one, and you think about the hint (or read about it, in this case) and look at the date of the clip you found, it should be straightforward to find the other three clips... which also means that if you give one away, you could be handing the answer to someone else on a silver platter.