If we look at the DC Comics canon, the Pocket Universe was developed by the Time Trapper as part of a larger plan to control the Legion of Super-Heroes.

Warner Bros./DC Studios’ “Superman” is easily holding on to the No. 1 spot at the box office with an industry estimated $57 million second weekend, flying high over Sony’s revival of the 90s slasher s...

It's possible that the moment of YouTube offering these Superman movies for free will be gone faster than a speeding bullet.