I have an idea fora work-around.
If you right-click on a running YouTube video, you have options like;”copy this URL”, which makes it easier to drop that into, say, a Facebook comment or whatever.
Another one of those right-click options is something like: “Copy URL at this point in the playback”. Using this, if you were going to make a video comment in Facebook, for example, your clip would play from a specific spot instead of making the viewer just watch the entire clip, just to get to the interesting/relevant bit near the end, or asking them to scroll to a time index manually.
See where I’m going?
On the YouTube page for your recital is a section for Information about the video. You can copy/paste any number of these “cued-up urls into that area as a crude playlist and, being HTML links, they *should* (I’m guessing) function similarly to the basic chapter menus of a rudimentary DVD menu.
Or you can list the time indexes for all the start-points of the various acts on the recital in that spot as well, for people to manually scroll to. But getting there from a single click is neater, I think:-)
Another way to go is to make a specific YouTube channel, just for this recital… make a master clip of the entire recital, then upload the chapters separately and make a channel playlist of each individual clip. Now it works even more like a DVD menu… but that’s more work for you. It does though have advantages, like control of being fully private, or just unlisted-private, etc. to somewhat restrict access. And you can work on/change individual pieces without losing the whole thing.