Only rides that start and finish at the same point (Loops) can be ridden as multiple laps.
Many FulGaz videos are point-to-point rides, including world famous climbs such as Mont Ventoux and bunch rides like Viva Ride Vegas. If you were to "lap" these rides, you would be instantly transported from the finish point back to the start after each lap, resulting in some rather eccentric top speeds, distances and route maps when your ride is uploaded to Strava (or your software of choice).
To maintain the integrity of the ride, point-to-point rides cannot be ridden as laps.
Riding laps is a great feature and we know you love it, so there are many rides available that can be ridden over multiple laps. You can find all of these under "Loops" on the main page of the app.