Hello, I have had the same situation on my X98 Pro, this happens when you try to boot Windows having selected Android mode or Android having selected Windows mode. Connect a USB keyboard (not a bluetooth keyboard) to the OTG cable. Press Esc or Supr to go into BIOS. Restore default values.
Press power on and volume UP buttons to get the boot menu again (you’te not getting it in the video), then select the correct button for the OS you want to boot.