Nice idea on tips sharing
I've not used mine nearly as much as I should have in the few weeks I've owned it. Thinking that I've got the still use fairly easily sussed I've been experimenting with the video.
So far I've bought a hotshoe microphone.... That means I can have IS on and not hear lots of whirring sounds on the video and the sound is stereo. Sound is now good enough. No plans on external audio recorder type things.
I've realised I need to understand the jpeg settings even though I only shoot raw. The jpeg settings and picture style apply to the video recording and the default settings have clipped blacks etc.
Video focus is by guesswork. You can start off with a focus lock on the subject but if it moves you have to manually refocus. There is a contrast based focussing you can use mid shoot but it is slow and unreliable.
My eyesight close up isn't good enough to focus by looking at the screen on the back. I have an old loupe type thing that was made to let you look closely at the screen on an old camera. Pressing it to the screen on the 5D2 gives me a camcorder eyepiece type view and makes manual focus a lot easier. just need to work out a clip on clip off mount now.
The prettiest video so far seems to be with my 50mm 1.4 not the 24-105.
Video processing is another major learning curve that I've not yet tackled properly. Making the camera mov files into a different format mov file does make them play nicer and is said to make editing easier. Something to do with converting it to all full frames instead of one key frame and a series of changes only frames as compressed by the camera. Could be talking nonsense here... as i said lots to learn