Controlling phone: open videos, images, files & guest modequestion

Hello, I love airdroid!!! I just signed up for premium, and I have a couple questions:

1. Is there a way to foreground an app remotely and open a file. For example, trigger a video file remotely and start playing it on the phone?

2. Is there a way to have airdroid running in the background while the user is in guest mode? So I'm the admin, but I log into guest mode, can it still work?

3. Is there a way to push a message to the screen, just as a popup?

Thanks so much!
–Patrick