Good point about the videos being English only. I wish I had the resources to offer all the documentation and marketing materials in other languages. Maybe you can still use the video as a guide to give your bandmates a tour of the app?
I personally find it hard to accept that clicking Repertoire > Set Lists > [set list name] > Big Lyrics is too much for someone to learn. I too have bandmates that use the app minimally or not at all, but this has more to do with "I already keep all my stuff in a notebook and I don't want to change that" or "I've never downloaded an app and I only use my phone for text messages." When we had simpler tools, like a private web page listing all our charts, the same people didn't use those, either.
On the other hand, I had a bandmate who was always clicking Repertoire > Songs at home and didn't realize there was a set list function with a special view for practicing songs. So I was thinking about rearranging the menus to put the view-oriented items first in each module (Repertoire > Set Lists, Schedule > Calendar, Finance > Totals). One approach to a "simple mode" would be to take this idea further and only show those items.
If we locked users out of everything but the set list view, people would say, "I want a simple mode that also lets me see upcoming events," etc, and the simple mode could end up more complicated than the current app. Even saying "I want a simple mode with a button that lets me see the rest of the app" would create a significant design challenge.
I do agree with the concern. I see plenty of subscriptions expire because only the band leader uses the product and the rest of the band doesn't see the value. I just wonder if this can be solved solely through design updates, or if we also need to give band leaders more support in selling the product to their bandmates. That has been one of my priorities this year, with more documentation, tips emailed to new subscribers, and the comics series highlighting various app benefits.