CRT

A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, the beams of which are manipulated to display images on a phosphorescent screen.[2] The images may represent electrical waveforms (oscilloscope), pictures (television set, computer monitor), radar targets, or other phenomena. A CRT on a television set is commonly called a picture tube. CRTs have also been used as memory devices, in which case the screen is not intended to be visible to an observer.

Since the early 2010s, CRTs have been superseded by flat-panel display technologies such as LCD, plasma display, and OLED displays which are cheaper to manufacture and run, as well as significantly lighter and less bulky. Flat-panel displays can also be made in very large sizes whereas 40 in (100 cm) to 45 in (110 cm)[8] was about the largest size of a CRT.

Devices that work on CRT televisions
Many modern game consoles like PS5, some Roku models (except the Roku SE), Blu-ray players, etc, no longer have AV video output, so anyone who buys such devices without a modern television could spend more money buying a modern television or an HDMI to AV converter, in case said television is expensive. They may not look good at 640x480.

Consoles
As of the 8th generation, AV video output is no longer present due to the HDMI standard and the last console to have it was the Wii U.
 * 1) Atari 2600
 * 2) SG-1000
 * 3) NES
 * 4) Master System
 * 5) Sega Genesis
 * 6) SNES
 * 7) Atari Jaguar
 * 8) PlayStation
 * 9) Sega Saturn
 * 10) Nintendo 64
 * 11) Dreamcast
 * 12) PlayStation 2
 * 13) Xbox
 * 14) GameCube
 * 15) Xbox 360
 * 16) Wii
 * 17) PS3
 * 18) Wii U

Media devices
Very few media devices have AV video output, since most have only HDMI.
 * 1) Roku SE
 * 2) Raspberry Pi

DVD/Blu-ray players
Only the old ones can have AV video output, since the newer ones only have HDMI due to the standard.

You may or may not have one of these.