This is not a topic I'm familiar with, probably best to research online. I'm not sure a video with alternating frames will work because the video frame rate and refresh rate don't match. You may need to have two separate videos, one for the left eye and one for the right eye. The left eye video is applied to one background quad and the right eye video to a different quad. There is some example code for doing this with an image in the
Display Background Texture knowledge base article.