To the trial lawyers' union. If legal representation weren't so expensive, there wouldn't be as much imbalance in the legal system. That's why legal self-help firms such as Nolo and We The People try to let you do as much as possible without a lawyer.
That's nothing to do with the lawyers, simply the DMCA and/or the WIPO treaty in action. Copyright holders can be penalized for spurious takedown notices, but the burden is on you to prove you are innocent.
to show the broad variety of tetris incarnations, it might be not too bad to show a short video of BlockoutII : http://www.coreloop.com/dump/5sec_blockout_xvid.avi this mode uses only tetrominoes and below (FLAT block set) and is a replay from one of the fastest blockout players. i will make a quadra video soon.
I don't know how o record video, but there are some Quadra replays tht can be downloaded in-game of the 5 highest scores. Perhaps you could pick one and grab the first minute or so from it?
you should try http://www.fraps.com and hope that your PC is fast enough. the trial version will do fine. fraps is totally easy to use. i am not at home currently, so the quadra video will take some time - so if you manage to get fraps to run, it would be great if you could make the video for quadra (and some other games)
Screen recorders for Windows that are free and Free include CamStudio and VirtualDub. That's the killer.
I doubt you'll get one of Quadra. I haven't found compatible software for recording it cleanly. Trying results in color inversion.
The software that I'm using to put the video together (VirtualDub and AviSynth) can probably reinvert the colors, using Levels with MergeRGB.