Skype for Business Videos by David Papkin
Skype for Business Server Topology Builder
Skype for Business Server 2015 DNS
Using the Administrative Tools to Manage SFB by David Papkin
Configuring Conferencing Settings
Deploying Skype for Business External Access
Deploying Persistent Chat Server
Back End Server High Availability in Skype for Business
This page by David Papkin has Skype for Business videos