These are FLV versions of the missing Making the Band 4 episodes (205, 207 and 209 part 2). The .avi versions of the rest of the episode are already floating around the torrent sites. To play, search for an flv player for your system. There are many free options.
If anyone has nice .avi versions of these three, please share.
I'm also looking for the full season of America's Best Dance Crew, thanks.