Mio A501 - Manual (Page 167)

Add-On Programs
9-3
9.2
H.263 Decode
With H.263 Decode, you can use Windows Media Player on your desktop
computer to play back the 3GP video clips that you recorded using the
device.
1. During the installation procedure using the Bonus CD, click Next on the
welcome screen when prompted.
2. Select the installation folder and computer user, and then click Next.