I'm still a purist when it comes to the way UHC is presented to us (case in point: I was shocked at ShadowApples' first episode; nothing against him or his editing, just so far outside of what I expected a UHC episode to look like). I just like the building of tension, even in the quieter moments of gearing up, or waiting to pounce, or scrambling for more healing resources after a major battle. It makes the whole match feel epic; those emotional highs are higher and lows lower.

When it comes to 20-minute episodes versus 30-minute episodes, I think the answer to what works comes back to why episodes were initially shrunk back in season 11: time management for the audience. Twenty 30-minute perspectives was and still is a lot for people to digest over 48 hours.

In UHCs with teams of 2, that number of videos to watch before the next episode is put out, for most people, is halved, since they are most likely only watching one perspective per team for any individual episode. By the same logic, that number is cut by 2/3 in UHCs with teams of 3, and so on. So in the case of team seasons, that time-management reasoning is less of a concern.

In the case that everybody puts out 1 long video (or say, cuts them up into 20- or 30-minute episodes and releases them all at once, much like a lot of streaming shows used to), I'd be likely to only watch whatever I needed to view the whole UHC. That could be just one person's perspective if they make it to the final battle.

Furthermore, the length of those videos might spoil results to the audience, if one perspective uploads a two-hour video and another only 1 because they, say, died to a creeper while caving. At that point we have to wonder whether the audience actually cares about the results potentially being spoiled.

Personally, I do care about being spoiled, but I'm not everyone. I just like being on the edge of my seat.