I sent an email to the developer of yamb, and he/she has never replied back to me.
I also bought
GetFLV and used the FLV Fixer on my files, but it does nothing. The playback is just as poor. Very slow and occasionally choppy.
This is really aggravating because I just put a brand new 512MB NVIDEA video card into my PC last week, and I am still having these problems.