video editing software
I gave one of the video presentations. Johan the other. So, what you want depends upon whether you are doing quick and topical uploads on the road, or your magnum opus upon return. Talk to Johan if the former, me about the latter. Also, are you a PC or Mac guy? If you have a mac then you don't really need to buy anything - the software that comes free with the machine is more than adequate. If you are a PC person, well, that's sad, but you'll probably do just fine with the recommendations made earlier in this thread. There are some cheaper options - there is a really good cnet review of some cheap and cheerful packages - just look on cnet and you'll find it easy enough. PM me if you like,and I'll sort you out.