pause() - pauses the media file. You can also use the movierate property, setting it to 0.
Example: sprite(1).pause()

play() - resumes playback of a paused media file. You can also use the movierate property, setting it to 1.
Example: sprite(1).play()

seek(time) - seeks to a different location in the media file, in milliseconds. You can also use the movietime property.
Example: sprite(1).seek(25000)