If this question has been asked before, feel free to delete it. As I was sifting through the archives on YouTube, I noticed that many systems are covered on the channel. But I was wondering about the Magnavox Odyssey 2 and the Atari consoles if they were possible to do. I'm not asking for anyone to actually do these, but I was wondering why there are no longplays for these. Is it because of the type of games, the access to the hardware or both? Just curious.

That is something that I wouldn't mind trying. Though I don't have the equipment to record such things. If I did, I would have sent in playthroughs for DC games and Panzer Dragoon Saga by now. But alas I have no such means to do it. (also I don't have Atari or Magnavox Odyssey stuff)

Dunno, but there might not be any way to record longplays of MO2 games and games from other Atari systems. You can try connecting the system to the DVD player that records DVDs and record the footage to the DVD. If it works, it works. If not, try a different method.