I've actually used this program before. There's a huge issue with determining the number of neutral creatures on the Chinese map (the rest is tolerable). Also, it's unclear how to play back the recorded video; F11 doesn't help. Please explain what to do.
And it splits the stack into individual units.
F9 - selects the folder where to save the video; two subfolders are created: one for autosaves and one for battles.
F12 - stops the video.
Then F11 - a menu appears, allowing you to select the date range to record.
They use a system like 1M2W3D, but we just specify that the day is 123.
Anyway, it worked for me - I made a few moves in multiplayer and watched the video. However, when I tried to play with another person, the program crashed when selecting the starting faction. :(
I need to figure it out - either write it myself or find/ask for the source code.