Ok, try this: after you import the video, select the video, press F8 (convert to symbol), and select graphic, after that you may do whatever you want to your video, alpha (fade), tint, whatever. . but then the problem i told you before comes up. . . whats that for?? if you are going to use it on the web? what? because if you make flash do those things(fade,tint) and the video it`s heavy you might experience some problems, however try it, it depends on the compression you give it when you import the video.
Good luck.