How to use the sequence editor with 3D view?

I am looking to use the sequence editor for processing a vblog and adding 3D effects as an overlay. Most of this is readily understood by me, but I have one feature that seems to be missing.

I can’t seem to find a way to show the sequencers output as an image backing for the 3D view, or as a texture on a material.

Am I missing something, or is there another way to allow me to see the video while adding 3D effects?