I saw you new screen that you put into the new live session and it was awesome!
I dont know how this will work for your setting or with roll 20, but there is a company called Neonode that created Airbar (http://www.air.bar/) they make a screen into tuchscreen. it might work so you can move the characters yourself on the screen. Check it out and see if its any good for you
Keep up the awesome content!