this is what I would have done in college if my teacher asked me to do it.

i assume it is from a video cassette. record the video's audio via VCR/stereo mix and record it to a cassette tape. bring it into the studio and record the tape to the computer. save as mp3. done.

god i loved doing bumpers for radio!!! i should go back to the station and get the DJ gig again. lol