> My library manages to lend ebooks; they even have wait lists for them.

Those are made available in that format by the publisher. No equivalent for movies is available (as far as I am aware).

Also my understanding is that it was never entirely clear if lending ebooks like that in the US was legal or not. The publishers and lenders both carefully avoided the issue going to court IIUC. (Prior to the Internet Archive's actions, that is.)