How do they do that?

On all the news stations reporting about the war you will see a movie scene playing in the background (scenes of war or flags waving) as they show other animation or live footage in boxes or frames in front. This is also done in many computer games like Battlefield 1942 and Return to Castle Wolfenstein while you are choosing game options you will see background movie scenes.

What is the technic used to accomplish this?

Thanks

YOu can do that by loading a external file into sprite. tutorial

IF you have a movie clip (avi, mpeg, ...) than you must convert this into swf format.



TK

AS tk said you can convert it to swf format. but if the movie size is large you may want to convert it to FLV instead.

goodluck

By loading an external file into sprite you can easily do that effect and yes bubblefilm is right, large movie size should be converted into FLV instead of SWF.
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Just upload an external file and you'll see what you want.

You can do that by loading a external file into CSS sprite as mentioned above.