It's MPEG-DASH, and I think Apple has HLS. It's basically better by every possible metric _except_ the one you mentioned, which I'm sure you'd agree is an uncommon use-case. It's not designed to stop downloaders, it's trivial to download.
If you really want to play things multiple times, you can probably muck with your browser's cache settings, just tell it to cache a ton. I used to do that in Firefox when my mobile connection sucked, so I could buffer it all up and then just watch. Or easier yet, just use a download tool.
If you really want to play things multiple times, you can probably muck with your browser's cache settings, just tell it to cache a ton. I used to do that in Firefox when my mobile connection sucked, so I could buffer it all up and then just watch. Or easier yet, just use a download tool.