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/rhopenshift450+ video covering amazing topics
Couple of examples:
Understanding service brokers (three part video):https://www.youtube.com/watch?v=iBVFq0X4ELwhttps://www.youtube.com/watch?v=jFtPGhhEQoUhttps://www.youtube.com/watch?v=GskndjGGbdQ
Network Policy Objects in Action:
Enjoy mastering OpenShift
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