Three woodpecker species at New York feeder

This video from New York state in the USA says about itself:

Three Woodpecker Species Visit Cornell Feeders At Same Time – May 15, 2020

Three species of woodpeckers line up in a row at the Cornell Feeders. Watch a Red-bellied Woodpecker arrive first at the middle suet feeder. A Yellow-bellied Sapsucker comes next, hitching to the seed block at the back left, and a Hairy Woodpecker arrives third, zipping onto the log-shaped feeder at the left of the frame. What differences do you notice between these three woodpeckers?