According to the verified peripheral http://elinux.org/RPi_VerifiedPeripherals my Logitech C910 HD camera should work with the "uncvideo" driver.
How do I install this driver? Is it a simple as copying it to a particular directory or is there a more elaborate process?
And when it says "works with external power" what exactly do they mean by that? Does it mean I can't depend on my raspberry pi to power the web cam? How else am I going to power it then?