I find this a bit random. Something more purposeful would have been legs with an objective, such as a guy's legs kicking a soccer ball down the sidewalk, as he walks. A pair of woman's legs pass by from the opposite direction. He leaves the ball and starts following her. She stops, so he stops. Her legs turn, as she looks back towards him. His legs turn and strike a casual pose, like he is not following. Her legs turn forward and continue walking. His legs follow. She gets in a car or bus. It drives away. His legs get on a bike and follow the vehicle. It could end where his legs catch up to hers, but then her boyfriend's legs walk up, wearing biker boots. The soccer guy's legs stop, turn, and run away. The biker legs chase him.
It's just an example. In my opinion, this video is a bit long for what is happening.