Yes. The CubeDock supports HDCP for video output, including when connecting to an HDMI display.

The CubeDock does not have a dedicated HDMI port. All video output is routed through the three downstream Thunderbolt 5 ports. To connect an HDMI display, you will need a USB-C or Thunderbolt to HDMI adapter cable. HDCP is supported through this connection, so protected content from streaming services and Blu-ray playback will display normally.