Corporate internet + Android video problems

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http://stackoverflow.com – We've developed a HTML 5 based solution to replace an old flash based solution for the delivery of video based content. The intention of the upgrade was to escape the grip of flash and allow the service to work on mobile devices. Everything works great internally and externally on PC's/Mac and iOS. Android however totally fails when connected to the corporate WiFi and we cannot figure out why. The proxy settings are correct and the internet is working. When trying to view the video and watching with remote debugging the requests just says pending but never actually completes. Network The (HowTos)