Videos
Anything by Henrik Kniberg
What to do When Scrum Doesn't Work?
Process
Don’t Let Your Agile Sprint Become a Mini-Waterfall Project
Teams
4+3+2+1 Team Success Factors - This is Agile
From I to T: Collaboration of Roles in Agile Teams
Spotify
These videos represent a snapshot in time at Spotify. They have since refined and improved their methods, as continuous improvements is one of the main tenets of Agile.
Scrum Training Series
These 6-8 videos provide a great overview of Agile Scrum and the Scrum Ceremonies.http://scrumtrainingseries.com/