https://youtu.be/O8vGiLIdSas

I guess this video of a recent test has been discussed before but I am not yet up to date with the forums (been away for a while)... Can anyone explain to me what the light dot on front right bumper is?
Are they measuring yaw and roll or why is there a light on the road?

And why is the TMG car still running? Are they building and developing the car and Tommi maybe building the team structure and the people required to run an event?

And why still run a car that at least when I last heard about it was built to 2014 specs? Maybe they've done updates to it.