Ahh, brings back such memories.
That was me. And you are correct, the problem turned out to be a bad ground with the instrument panel wiring harness. Took a couple of days to find.
Let me tell you, that video looked eerily familiar -- except mine would die too. But sometimes it would restart and looked just like that all the way to the shop.
The good news is that I have not had that problem resurface.
OP - GL.