I also recently had to find a solution for chopping vids although my needs were different then yours and my solution wouldn't be what you need.
I don't use Windows so I don't know anything about what are good Windows programs for chopping up vids but I have recently spent a lot of time determining what it was that it was I needed in an application for chopping up movies and what to look for.
I'm chopping up movies for Foxy's affiliates to use so I needed something that quickly moved through large, 10 to 50 gigs, long movies, up to a hour long, while precisely choosing the beginning and ending points of the clips I wanted to make.
I ended up using
Final Cut Express which would be overkill for most but after a steep learning curve I can now take a one hour movie and extract 15 to 30 clips that are exactly 11 seconds long and be numbered in the correct order very quickly.
Final Cut Express doesn't make thumbs and I have to export the clips one at a time but it does give me the precision for creating the clips that I was looking for and is super fast even when working with movies that are 50 gigs in size and up to a hour long.
What it is that I like about Final Cut Express is that I can mark the beginning of a clip, type +11. to move the time 11 seconds forward, mark the end, and then start scrubbing the movie to find where I want the next clip to start.
I just ordered the
Contour Designs ShuttleXpress for working with Final Cut Express which should make it even easier to work with.