Zoom is great for when every observer is also equal participant. But seeing some over-prescription of zoom.
If most invites are just viewers, you're prematurely de-Interneting things. People who want to watch what is basically a livestream to them, hit wall w/non http app.

(Talking about public events, here. Not private meetings.)

If you're author on a book tour trying to promote your book, consider pushing back on zoom reading/interview unless they're promising to put it up on YouTube right after w/promotion.

Pop quiz hotshot.
You host live video event, your potential viewer sees your tweet 24 hours later.
- they click your zoom link (game over)
- they click your youtube livestream link (works just fine)

Exactly what I was talking about.
Whether you see this before, during, or after the event, the YouTube livestream link will work great. https://twitter.com/noahkagan/status/1250219471056318469