I'm sure they mean 50Hz lighting, and not 50kHz. That would be quite a shutter speed to match that! But aside from that niggle some really nice tips - particularly the ones about writing the voiceover first so you know what to shoot, and about choosing a slightly lower camera height so you get less ceiling in shot without tilting the camera (which would look bad with a WA lens).

One tip I learned from watching news footage come in for editing: if you have a moving camera (which they suggest in the article above), then for max flexibility in editing, start on one place, do your move, stop and hold the camera position for about 5-10secs (time it as it always seems longer than it is) then do the move back, and hold the shot at the end of the "return" move for a similar time, 5-10secs. That way you get four possible shots out of your one: one still at each end of the pan, and two moving shots, one in each direction. You have maximum flexibility in editing for not much more time taken during the shoot.