Not seeing YouTube thumbnails

I've encountered this issue a number of times at customer sites protected by good quality firewalls with web content filtering.

The issue is that you can view a YouTube video but the thumbnails for the videos you want to watch don't show up in YouTube.  This makes browsing YouTube less than entertaining and a little tiresome.

To resolve this issue you need to un-block or allow access to the following domain on your firewall:

ytimg.com

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