Can some one explain...

[AndyThomas]

Yes, they're short (ish) films - they come in at around an hour and a half and are a mish-mash of various episodes. They're not a great capture of the series as a whole, as they use some episode footage edited together out of sequence, but they are a good reminder of it nevertheless. Phil's site provides a breakdown of exactly how they're put together, I haven't done the exercise myself.