Interestingly, both seem to be projects from French developers, and they look very similar.
Also see IanniX (https://www.iannix.org/fr/) which is another OSC sequencer from french developers & researchers and Open Stage Control: https://openstagecontrol.ammd.net/ (yes, also french ;p)
@op: ossia has some support for PTZ cameras (mainly through NDI) and MIDI/HTTP/WS/etc..., I'd be curious to know if it would fit your bill. Definitely hooking some MIDI control to a PTZ movement should be a matter of a few clicks at most but I don't have a PTZ camera plugged in right now to make a small video.
I have started to mess around with Chataigne, it seems promising, but this far I'm getting stuck at trivial steps (matching a regexp, converting a "contains" to bool, etc). We'll see how I progress with support:)
But that guy is clearly brilliant just like Chataigne.
Thanks for mentioning!
https://github.com/benkuper/Chataigne