For now please see Metavid's Quickstart guide.

[edit] mplayer

mplayer -vo null -af scaletempo -speed 0.8 video.ogv

This command plays audio at 80% of the original speed while maintaining the same pitch (i.e., no chipmunk effect).

Rapid window shifting to a basic text editor, combined with rapid start/pauses... [insert screenshot here]

[edit] Also see

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