I decided to have a go at a quick video talking about 50mm lens for Canon DSLRs. I used the 5D Mark III/ 24-70II, Rode microphone, Metz 320-Led Mecalight with orange gel (to colour balance the ambient indoor light). I controlled it from a Windows 8.1 Toshiba tablet running Eos utility - this made focussing and starting / stopping the video quite easy. I went with f/4 as an aperture setting.
Recording set up: