On your access level, use auto qos commands to set up trust/conditional trust. Refer to here for both voice and video:
http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND_40/QoSCampus_40.html#pgfId-1144082
For your edge, refer to the 4 class model QoS for use on routers (you can refer to 8 class model as well in same doc if you have more classes):
http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND_40/QoSWAN_40.html#pgfId-129811
Also review this document for a better understanding of the QoS principles and best practices.
-Terry
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