Beijing Scrum

The Scrum Guide.

The best virtual Scrum certification training. Sign-up for the Certified Scrum Master (CSM) Create Adaptive Product Teams in Any Business.

These are some good videos about Scrum:
https://youtu.be/TEnGSDJoWHE
https://youtu.be/XjDrG16sIY4
https://youtu.be/Np1TBeKCOP4