Coax cables are prone to data/signal loss over distance. Fiber technology is faster and more reliable than Coax but requires more investment. Coaxial cables require minimum investment and maintenance.

This a quote from the above technical note sbaa300a page 1. "Digital interface Receiver (DIR) supports TWO inputs w. integrated coaxial amplifiers. This allows direct connection to HDMI eARC source OR ...

It often refers to early TV sets that accepted signals from an antenna or VCR only via a coaxial cable. Modern TVs have coax inputs plus inputs that use RCA phono and HDMI cables. See F connector.

Its primary use is the light compression of high pixel rate (4K, 8K) video content to a lower bandwidth to allow real-time transport over IP networks and ... modules that interface HDMI equipment with ...