At the time, FireWire 400 (and later 800) was significantly more reliable and faster for sustained video transfers than USB 2.0. Current Status
: One of the most famous dedicated FireWire DVR units was the Toshiba Symbio firewire dvr
A DVR (like a cable or satellite box) that uses a FireWire port to connect to an external hard drive for increased storage. At the time, FireWire 400 (and later 800)
Most modern cable boxes have disabled their FireWire ports or removed them entirely, as HDMI provides a simpler (and more secure for the provider) single-cable solution for audio and video. At the time