I've been drawing trees in Greenwich Park, so I was interested to hear Eddie's approach. Eddie and I used to run an art gallery in Camberwell for six years with some friends, and he trained in sculpture at the Royal Academy. You can see more of his work here on his website.
Eddie Smith - Drawing Trees YouTube link
I know zilch about making videos, but I've been messing around this evening with iMovie and hopefully you can get the general idea. (Sorry the resolution's still a bit dodgy, do let me know if you have any problems viewing it.) I got a kick out of seeing how Eddie's five-year-old daughter butted in, being very silly, but then got very absorbed in talking about her dad's drawings.
I took snapshots of a few pictures he picked out: