The video clearly shows a HUD lap timer, which was used to determine the lap start, end, and time. The track name 'Silverstone' and vehicle brand 'Porsche' are explicitly mentioned in the video title, description, and HUD overlay. The date is also visible in the HUD and title. The footage is continuous in-car POV throughout the lap. The estimated track length is based on the known length of the Silverstone Grand Prix circuit.