bandito
Super Freak
First, to correct you. My "name" is Optibotimus.
You could potentially cut new plexiglass if you wanted. However, it wouldn't fit into the grove sections on the bottom where the blue lights come from. The plexiglass they provide fits just about perfectly into that slot. I don't believe the angle matters in having the hologram details show up. In the instructions provided, they show the plexiglass piece being vertical.
As i said, i tried a couple different things to see if it would work and i couldn't figure it out. Hopefully if someone does, they'll let me know. I'd appreciate it.
Optibotimus (Got it right this time )... the plexi is meant to fall back (like it did in your video, & not by accident) and (probably) held-up by the light protrusion on top... like shown in the pic below: