Playback MP4 with iPod Video/iPod Touch/iPhone

• 1). Open iTunes, click "File" then click "Add to Library."
  
  
• 2). Locate your MP4 files, select them, then click "Choose."
  
  
• 3). Connect your iPod (or similar device) to your computer. Click your iPod in iTunes' left-side navigation panel.
  
  
• 4). Click "Movies" then the MP4 files you've added.
  
  
• 5). Click "Sync." Disconnect your iPod after synchronization. You can now play back the videos on your iPod/iPhone.
  
  

Playback MP4 with iTunes

• 1). Download, install and open iTunes if you don't have it already (see the link to Apple's iTunes site in Resources below for a free download).
  
  
• 2). Open iTunes, click "File" then click "Add to Library."
  
  
• 3). Locate your MP4 files, select them, then click "Choose."
  
  
• 4). Click "Movies" in iTunes, and double-click your recently added files.
  
  

Playback MP4 with VLC Media Player

• 1). Download, install and open VLC Media Player (see the link to VideoLan's Download page in Resources below. Under "Binaries" choose your relevant operating system to begin the download. This is freeware).
  
  
• 2). Click "File," "Open" then "Browse."
  
  
• 3). Locate and select your MP4 files, click "OK" then "OK" again to watch your MP4 files.
  
  

Playback MP4 with Media Player Classic

• 1). Download, install and open Media Player Classic (see the link to Afterdawn's Media Player Classic page in Resources below).
  
  
• 2). Click "File" then "Open."
  
  
• 3). Locate and select your MP4 files, then click "OK."
  
  
• 4). Watch your MP4 files in Media Player Classic.