Quicktime, Windows Media, VLC To control media playback speeds
Quicktime
Open media Window --> Show AV controls
Quicktime Playback speed is in the bottom right of the AV control
VLC
Open media Make sure View - -> Status Bar is on Click the 1.00x at bottom
VLC Double clicking the 1.00x gives you a slider to adjust playback speed
Windows Media Player
Open media. (You may first need to hit Control-M to reveal the File-Open menu) Now Playing - Enhancements - Play Speed Settings
Windows Media Player Slider at bottom left lets you control playback