How to Create and Use Image Planes in Maya (for reference or rotoscope)
It's live...so there are lots of pauses, "ums" and even a mistake or two (don't worry, I corrected the errors...live).
You can use these steps, or a hybrid thereof, to import an image sequence onto an image plane in Maya.
For the purposes of this tutorial I am starting in Photoshop, rendering a JPEG sequence from the timeline and applying the sequence to a camera's image plane.
Shout out to Ugur Ulvi Yetiskin, the creator of the Ultimate Ball Rig.