One thing that I've noticed, and I'm not going to say what program it is, but I've noticed that since Lionsgate's contract with Henson ran out, at least one Henson special that Lionsgate released is on YouTube... and yet the uploaded date is from around 2008. I know it was removed when Lionsgate got the rights, and I'm pretty sure the productions Lionsgate flagged were not blocked from some countries but not others (I could be wrong). As far as I know, if a video's removed and added later, the original upload date can't be put back in.
Then again, I think every video from the Sesame Street channel still has the original upload date, even though the channel was briefly taken down due to hackers. Not sure how all that works.