Choosing a format : parameters to take into account

Don't use a new media because it is new : chose it reluctantly because you really need it, and make sure that your web site is still usable without an access to that latest trendy next-internet-revolution...

Did I already told you that all the computer are different on the net ?

Display Size : From 640x480 to 1600x1200 pixels

Processor speed (important to decompress video or java animation)

Video System (integration of multiple video, 3D)

User Knowledge

User Willingness

System Software

Browser type and settings

Network Configurations and Firewalls

Plug-Ins

Computer Platform