BBB with custom GUI

Hi, I new in BBB and linux.
I need to display on a LCD (22") a loop of a video file and the state of some pushbuttons and analog sensors.

How I do this?
I have tutorials of python and cloud9 programming on BBB so I think I can manage with the firmware of pushbuttons and sensors.

python + GTK? QT?

I have found Derek tutorial:

Any help?