Scrum Beijing

The Scrum Guide.

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

These are some brief videos about Scrum:
https://youtu.be/q45zbcwCbkw
https://youtu.be/DSQADSAsHiU
https://youtu.be/g_VTNFG-SAE