Nope. Separate infra for this project. I know, because I'm on the team that built both.

We don't, but streaming on YouTube/Twitch have some caveats that ruled them out for this.

Like what?

Content restrictions/moderation decisions that would be out of our hands.

In this case, we're a paying customer of the provider, not the product.

I would love to know your streaming setup for this. I did an interactive project using Twitch/YouTube chat a month back, controlmylights.net, and I found the delay on both of services was pretty bad. And you can't use Twitch's low latency mode on Safari/Edge. Also, unless you can monetize on YouTube you can't embed a live YouTube stream.

If you are interested in how I made it: https://edwarddeaver.me/portfolio/control-my-lights/