Videoclips were initially offered using only three formats: "modem quality" (28.8 Kbits/sec); "broadband quality" (about 100 Kbits/sec); and a "progressive download" format.

As a result, you can create a video for high-quality versus low-bandwidth, and progressive download versus streaming, and also troubleshoot problems if the video won't play on all devices.

Progressive decoding to be able to decode an image as soon as download begins.