WorldTour racer Alexey Vermeulen trains with his dog Willie in a backpack.

The video likely performed well due to its unique and heartwarming premise of a cyclist training with his dog in a backpack, combined with the visually engaging content of the training session and the relatable theme of trust and teamwork.

This video shows WorldTour racer Alexey Vermeulen training with his dog, Willie, in a backpack. The text highlights how Willie not only adds drag but also helps with aerodynamics, demonstrating a symbiotic relationship between the cyclist and his dog. The video concludes by calling it a testament to trust and teamwork on the road.