Hi,
Ya you can defintely do the above things…!!
You can use USB WEBCAM and interface it with Rasberry Pi…
Make a live streamer (open source available) and a HTML page..
On html page include following sections of GUI..
1. Screen for live streamer output
2. Buttons for FORWARD, REVERSE, LEFT TURN, RIGHT TURN and STOP
For all 5 buttons, make a seperate code and whenever you press the above button, that code will run..!!
All the best…
Post if you have any query..