I helped put on a fundraiser that was streamed to a large audience. This audience skews older, but is highly educated and engaged. In our early testing, a fair percentage of people couldn’t figure out how to download Zoom (or similar products), click through the link to be connected to a stream in one of those products. This was on the 4th of July, so you’d think people would have had plenty of time to get used to Pandemic Chat.
The cost of streaming to big groups over products like Zoom or Bluejeans would have been pretty high. We ended up streaming via YouTube Live. It maximized the accessibility (a single link to click, no software to install), and it cost nothing. I mean, we paid for StreamYard which is an awesome product, but that cost three orders of magnitude less than some of the other end-to-end streaming products would have. We also were not doing the full interactive thing because of fear of troll attacks, so that did make a difference in our choices.
The downsides were that we couldn’t use prerecoded music that YouTube’s algos would flag as a copyright violation. Weirdly, YouTube makes it really hard to show that you’re licensed for a bit of media.
I also worried about artists performing their own work live. I don’t know how sloppy the matching algorithm is, nor what’s “too close” to a recording. Fortunately, we didn’t get snagged on this. Especially since I didn’t have a backup plan 
