People tracking can be started several times for one video (feedback problem)
Not sure if this is still work in progress but I trigger people tracking as often as I want. I recognised this specifically on beta.vortanz.ai since the feedback does not really work (no indication that I started the process). In the data views branch I get a spinning wheel that indicates that something is going on but I still was able to trigger it again and again.
Maybe thats solved with !734 (merged)?