Once the mod is installed and enabled, simply use the command /replay or /cutscene to get started. From there you will be able to start and stop recording, and edit your previous replays. Note that on Singleplayer, when clicking to open a Replay you'll get a message saying that you will get disconnected. That is expected, then simply click 'Reconnect' to access your Replay.
Export / Render video
Because Hytale mods are server-side, there is no way for this mod to implement any kind of video rendering. And it's not even a feature in the game for Machinimas.
However, I added a button that allows you to hide the Editor UI until you click again, so you are able to record the result as a video using an external recording software.
License
License only applies to the software, source-code and assets, you fully own any content you make using this mod.
Feel free to use it on your Experiences and Public Servers too, attribution would be appreciated.