Medium difficulty test chamber that is dark so that makes it harder. I turned up my brightness after a while and that helped a lot. We lost the cube and it didn't respawn so we had to restart. I blame the pedestal switch. We took a couple of shortcuts that may not have been designed - portaled to the ball dropper switch, skipped the angled panel jump with portals and switched the angle panel pedestal switch through the floor but didn't use it after all. Here is our play-through:
https://youtu.be/w_bSsJTlJ9c