Storage Spaces Direct 2016 - 5min video that explains it all
I was lucky to see a longer version of this at a recent internal event, however I think this gives you a lot in just 5minutes - do you agree?
https://www.youtube.com/watch?v=raeUiNtMk0E
UPDATE: nVME and 3 Million IOPS with Spaces Direct
Also a see a link in this blog to an Ignite session on Spaces Direct:
If you have 12mins, this video covers Storage Spaces Direct and replica