Amazon Prime.
A documentary about the invention of the time machine, told in oral-history form.
It's cute. Full of little things that you need to pay attention to, as the narrators go through the history of time travel. The story they tell would have made a good movie in itself, but this was a cute, low-budget way to do it.
Worth taking an hour and eleven minutes.
The History of Time Travel
The History of Time Travel
"Be bold, and mighty forces will come to your aid."