I agree with xpi0t0s. Bypassing a school firewall is one thing, but bypassing a workplace firewall could get you into trouble because:
a) They are paying you for your time, not vice versa
b) Workplace admins are much more likely to monitor their their network and pay attention to what's going on than school admins.
c) Bypassing a school firewall would only get you into a bit of trouble, if any. Bypassing restrictions on company resources could cost you your job.
If you really want to watch the videos at work, consider downloading them at home and watching them over vnc or remote desktop. That way all the traffic just looks like a remote desktop session but you still get to see your videos. Although if you watch regularly, they may wonder why you need to access your home computer so much (maybe you're copying over company files?, etc).