AV cable is more common than you think - you need it to connect your gaming console, a set-top box to the TV, DVD, music system, and more.
HDMI 2.0 vs 2.1: Which Cable Should You Buy? - The Plug - HelloTech
Audio/Visual Cables: AV Home Theater Setup
Ultimate Guide to Flexible Conduit: Everything You Need To Know
HDMI 2.1: What you need to know - CNET
Reseller Accounts & Wholesale Pricing
11 Cable Types Every Homeowner Should Know - Bob Vila
AV receiver buying guide
How to Ground Your AV Receiver to Prevent Audio Interference
AV Cable - The Ultimate Guide You Need to Know
The definitive guide to RCA cables: everything you need to know