Yes, shaving your legs can indeed make you slightly faster when cycling. According to the experiments conducted in the YouTube video you're referring to, a cyclist could potentially see an improvement of about 4% at speeds of 30km/hr after shaving their legs. This could result in energy savings of about 5 to 15 watts depending on the speed at which the cyclist is moving. While these gains may seem minimal, in the context of competitive cycling where races can be decided by fractions of a second, even a minor increase in speedcan be crucial. However, it's worth noting that the aerodynamic benefits of shaving legs are just one factor among many that can affect cycling performance, and they might not significantly impact the average cyclist's performance. Other factors like fitness level, cycling technique, equipment, and nutrition arguably play a much larger role. Moreover, many cyclists shave their legs for other reasons, such as facilitating wound treatment and massage, or simply because they prefer the feel or appearance of shaved legs.