BkFurman Said:
"Sound but no video: When using a Displaylink docking station (Dell D3100) in order to enable three screens I get audio but no video on my screens when I use any streaming services. Any ideas why it does not allow video to be displayed? I tried apps, Chrome, and Safari. All types give no video when played. Thanks in advance."
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What is the source of these videos?
Troubleshooting Video Not Playing:
A. App Restrictions:
On some apps, you cannot broadcast it, being it is an issue of piracy.
B. Use 4K Cable:
You may need to use a 4K HDMI cable.
B. Recording Regulations:
When recording the screen of iTunes, only audio may play. The screen will stay blank. It is a matter of piracy (on Apple's end).