While this is an interesting example, I don't have any doubt that there are plenty of other things that you would like to store than just video. And many of them may require *much* more storage capacity.
Let's take just one example: chess. As far as I know, most endgame databases currently in use are up to 5 or maybe 6 pieces remaining on the board. A 6-men endgame database is about 1TB. And as you increase the number of pieces, the size of the database grows very fast.
I don't event talk about storing all possible chess positions
... But here's a quote from this article
, including some new numbers for you to play with:
"Allis also estimated the game-tree complexity to be at least 10^123, "based on an average branching factor of 35 and an average game length of 80". As a comparison, the number of atoms in the Universe, to which it is often compared, is estimated to be between 4x10^79 and 10^81."