I mentioned this in discord while the stream was live so I'm not sure how many of you (aside from Pearl, who replied) saw, but if you have such a large backlog (and a stream takes that long), then it might worth considering having 2 smaller streams a week with 6-7 replays each, instead of one large one with 10. That way you would get through the backlog quicker and the streams wouldn't be as long. I don't believe you would run short of them anytime soon either way. Of course, this needs to tie in with the schedules of the hosts, naturally (so it might not be feasible in the end). Alternatively, to cut back on the length of the stream, you could try not having 9 full game runs or whatever. Put in one or two extra stage runs or the single stage/spell replays that I'm sure some people submitted. Naturally, this was the first stream so it wasn't possible to tell how long it would end up being, so maybe this is still sort of within expectations. I'm just throwing in a suggestion for you to consider.
Good job on the first stream.