[ WARNING: Opinion ahead. YMMV ]
I don't mean to harsh your buzz, sir, but as a 35-year IT guy, a 25-year TV guy, and a 5-year live
theatre and production guy, I wouldn't personally recommend to anyone an app for doing live show playback that runs over HTTP/depends on a web browser to work right.
There are *way* too many points of complexity in that development/deployment environment for something that has to have 5ms response time every. Single. Time.
I mean I *really* hate saying it -- there's way too little good software in this space. But this just isn't the way I recommend developing it.
[ Example 1: My browser (which is not supported), is FF/64 66.0.5, which is about 72 hours old. Chasing browsers around is hard enough when you *aren't* aiming for 5ms response time... :-} ]