Can I extract ReplayTV show files and save them to another format somehow?
Yes, but it involves removing your ReplayTV drive from the unit and connecting it to your PC. Use FlipFlop’s wonderful RTVExtract program to do it. The files are standard MPEG2 files and you should be able to play them on your PC if you have the correct codecs, which are installed by basically any demo DVD player you can download from the internet.