OpenShift has a very active contributor community and they produce massve number of videos that either explain the high level concepts or simpy show step-by-step instructions how to do stuff.
If you like OpenShift and want to see really cool stuff check out the OpenShift Youtube Channel: https://www.youtube.com/user/rhopenshift
450+ video covering amazing topics
Couple of examples:
Understanding service brokers (three part video):
https://www.youtube.com/watch?v=iBVFq0X4ELw
https://www.youtube.com/watch?v=jFtPGhhEQoU
https://www.youtube.com/watch?v=GskndjGGbdQ
Network Policy Objects in Action:
https://www.youtube.com/watch?v=OpNKZ0GX4wc
Jenkins BlueOcean:
https://www.youtube.com/watch?v=IQ8H7XNbQ-8
Enjoy mastering OpenShift
