OK. I’m assuming you’re looking for the inclusion of a .mov movie in your flash site? Then you’re in luck. MX does support import of video.
Flash will recomress your video, but you have control over the quality.
Choose import from the file menu and navigate to the folder where your quicktime movie is filed. Doubleclick the filename and you’ll be presented with a large menu of options - one of which is a quality slider. If you crank the quality to 100% you’ll get the closest thing possible to the original compression.
Careful with that… depending on your purpose, you’ll have a potential problem if the quality (i.e. bitrate) is too high on the net. Watch the other settings also - slow machines can have trouble decoding high motion, high framerate, high quality video.
There’s really no substitute for just playing with the settings and testing (and then more testing…) the output.