Nice! Audacity fixed the problem. Cut off few parts and made it to play in lower Hz rate, it really decreased size dramatically. From 2.8 mb to 800kb.
About switcher, I noticed that there is video converter which I needed so I can convert "FRAPS" movies into usual movie files. (FRAP movie file gets up to 2 gibs when record for 5-10 mins).
So thank ya both!