The video shows a man, thought to be in his 40s, giving chase and pushing the woman to the ground after being asked to wait, police said.
She managed to pull herself out of the road in Sidney Street, Whitechapel, east London.
The woman was shaken but not seriously hurt, the Met Police said.
Anyone with information about the dispute, at about 18:00 BST on 1 May, is asked to contact police.
Helmet camera footage showing a cyclist being pushed into the path of traffic after she asked a man not to cross the road in front of her has been released.