This page has links to Lync Server 2013 hands-on videos created by David Papkin.
Lync Server 2013 introduces many new features and significant enhancements to existing features and functionality of the previous versions. To use Lync Server 2013, you should understand its architecture, and be able to use the server features, client features, and administrative tools.
Preparing for Lync Server 2013
Deploying Microsoft Lync Server 2013
Configuring Users and Rights in Lync Server 2013
Client and Device Deployment in Lync Server 2013
Conferencing in Lync Server 2013
Deploying Persistent Chat in Lync Server 2013
High Availability in Lync Server 2013
Disaster Recovery in Lync Server 2013