Im trying to use green screened footage in this rendered 3d space! Please Advise


Here is a screen shot, the image sequence im using is a TIFF exported green screen masked and rendered through blender.
I imported the image sequence as a plane so I can put in front of the camera in the digital environment, But the image sequence is playing slower than it did when it was a video.
Its also kind of transparent, how do I fix this problem?