Hi,
@Cleo
Thank you for liking it, and also for taking the time to provide such detailed feedback!
Regarding the first issue you mentioned, if you could provide a screenshot or a clip of the recorded video, it would help me better identify the problem. Many other users are also using the Eosin rendering plugin to record dances in Produce 69, and some even produced VR video outputs. They don't seem to have similar feedback, so a screenshot or sample clip might help me address your issue better.
The render to movie plugin in the ZHFX package is indeed very handy, especially since in versions after 4.2, they specifically added frame-by-frame synchronization with audio for some of the audio-triggered stage scenes I've made before. However, Produce 69 and previous scenes are slightly different. It needs to call hundreds of audio files (dance tracks, voiceovers in several languages, etc.). To avoid loading all these audios at once during scene loading and for better management, I adopted the CUA packaging method for audio. Therefore, it might not be handled by the render to movie plugin in its current form. For now, you might have to manually add the corresponding audio files the traditional way. I'll get in touch with the plugin creator to see if there can be some improvements.