I don't think that changing the frame rate would lead to better quality for flash video. More than likely, the encoding would get faster, however. The only way to get more quality out of flash is to raise your encoding rate (vbitrate=800 to vbitrate=1200, for example). This will, however, result in much larger files and will require your visitors to have to have internet connections of at least 1.5Mb to view your videos without stuttering all of the time. Also, note that vShare does not encode (well, re-encode) FLV files so if you upload an FLV, it will be at whatever quality it was when you uploaded it.