Answer
PROBLEM
YouTube is set to Always Allowed but videos do not loadENVIRONMENT
- GFI WebMonitor
- all supported environment
SOLUTION
- Launch Webmonitor Configuration
- Navigate to Settings > Policies > Always Allowed
- Add *.youtube.com
- Add *.googlevideo.com/*
- Add the IP range of 173.194.36.0-20
- Apply the changes