I have that problems...
why?
@Dexter
You have that problem because:
1. Either the site got so much traffic that the account exceeded its allowable bandwidth and was shut off by the host.
2. Or the owner removed the video to reduce the bandwidth use so that the hosting charge didn't increase,
3. Or the owner looked at the referrers to the site and saw that it was this forum and decided that he/she didn't want the video viewed by braces fans/fetishists.
There is no such thing as free internet -- someone pays, either site owners or advertisers.