jitter blur effect

The question isn;t very clear to me.
From what i can see of your patch your not running your films into the jit.gl.videoplane objects (which would give a huge increase in performance and move everything to the GPU)
If you run your move through the jit.gl.slab effect (check jitter slab examples for over 4 kinds of blur) and then to jit.gl.videoplane then you can move each videoplane around and apply a blur over all of them.
Or.
You can can bind each videoplane to its own jit.gl.node (capture 1) and then apply a separate blur effect to each of them.