This video discusses OBD2.
What is OBD?
OBD Services or Modes,
OBD2 Monitors,
OBD2 Diagnostic Procedure, and
OBD 2 Scanners

Please find my best OBD2 scanners here:
Wired ones
Ancel AD310: https://amzn.to/3VfGKQL
INNOVA 5210: NNOVA 5210
Autel AutoLink AL329: https://amzn.to/3Vj4G5X
TOPDON AD500: https://amzn.to/3Rjs7eb

Bluetooth:
Panlong: https://amzn.to/4cawgZD