Now that Nexus 1000V, the first virtual switch for VMware vSphere is out for sale (and we know everything about it), Cisco is free to publish detailed demos of the product in action.
The company just uploaded two new HD videos on Facebook that cover how vEthernet interfaces relate to VMware vNICs, what are port-profiles, how to create them with a SSH console and how to apply them with the vSphere client, how to monitor the network statistics of a virtual machine despite its migration from a host to another with vMotion.
Both are worth a check: