Having the same problem trying to watch Roger Dougherty's business intelligence videos over the last week. No issues streaming/downloading videos from other sites.

Tracing route to mschannel9.vo.msecnd.net [65.54.95.160] over a maximum of 30 hops:

1     1 ms     1 ms     1 ms  192.168.0.1
2    40 ms    39 ms    40 ms  tukw-dsl-gw55-247.tukw.qwest.net [63.231.10.247]
3    40 ms    40 ms    40 ms  tukw-agw1.inet.qwest.net [71.217.185.177]
4    40 ms    40 ms    41 ms  sea-edge-12.inet.qwest.net [67.14.41.26]
5    45 ms    41 ms    40 ms  63-234-17-26.dia.static.qwest.net [63.234.17.26]
6    40 ms    41 ms    41 ms  ge-7-3-0-58.wst-64cb-1a.ntwk.msn.net [207.46.46. 41]
7    45 ms    42 ms    44 ms  ge-1-0-0-0.cpk-64c-1a.ntwk.msn.net [207.46.43.21 8]
8    47 ms    49 ms    49 ms  10gigabitethernet1-2.cpk-xmx-edgcom-1a.ntwk.msn. net [207.46.44.34]
9    40 ms    41 ms    41 ms  cds122.sea9.msecn.net [65.54.95.160]

hth,

Kris