Schedule a live stream of a pre-recorded video
So I ended up running the streams through Vimeo, who provide their own &quot;Livestream Studio&quot; software, which lets you stream from a pre-recorded file. They don't let you pre-upload the video, but it is apparently an often requested feature that they are &quot;looking at&quot;.
Vimeo also advised restream &amp; onestream as existing services to do this with - but without being able to verify the reliability of those services or get feedback from anyone, I was hesitant to use them. I tested Vimeo's software prior to airing the first stream, and that all worked smoothly, so in the end I just went with that. Out of 4 events/streams, the connection speed here did flake out a couple of times on one occasion, which is what I was worried about, but it otherwise worked.