I think I see what's happened here.
You don't unzip the ROMS on the phone, you need to flash the zip files in CWM.
Take the ROM you want, don't unzip and place it on your handsets SD Card. Once done, turn your phone off, take out the battery, re insert, hold volume down and power the phone on. In the screen that appears, select recovery, does it take you back into clockwork?
Aside from the first video, did you follow any guides at all for clockwork and/or installing ROMs?