jaMME does not work?Well, you could either:
1. Playback the demos and record the screen with something like OBS , then edit the footage with a video editing software. I use Sony Vegas, but you might find something like Wondershare easier.
2. Download a more complex demo viewer if you want to move the camera around like a movie. I have not tested this.
Not trying to advertise, but here's my 2 videos if you want to see them