I think the goPro is very usefule and cheap. Guess it depends on how your gauges are arranged. You kniow where the needles should be whne things are going well. In my case a GoPro worled well, but I also have a delay box to show RPM and a racepak but at one point the GoPro was it.

https://www.youtube.com/watch?v=73PrnH45uec&t=3s

"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"