I have attempted to use services such as Streamlabs’s web service and Restream.io, but have found none of these services fit my needs. As such, I thought of building my own, custom web-based video encoding service that has the ability to push to Twitch.TV. my question is about how these services push webcam data and the web-generated overlays to their destinations via a web-based client. Once I figure out how to generate the video and push it to Twitch, everything else will be simple. As I wait for responses, I will browse GitHub, and if I find anything I will answer this question myself for those who seek to do a similar thing.
It is preferred solutions be launchable as a static HTML frontend, but is not necessary.

I have yet to try anything simply because my searches thus far have not yielded anything tangible.