mine was attached to the windshield but many times it failed to recognize the start finish line and didnt reset the time for the lap. So i ended up getting a 7:27 lap which is actually 3 laps.
Never run into the issue of no video. but i cant overlay the 30 min sessions for some reason. I am using the latest version of HTL.
BMW M3 E92 - Silverstone II
BPM Sport Stage II Tune + Test Pipes, GTS DCT Tune