I have nothing against instructors using the name of a military unit to sell either their own hand-to-hand combat system or one that is used effectively by that unit. Not at all. For the most part, I see this as a marketing thing and each instructor/author has to make decisions on that front.
If you want to connect a USB device to an HDMI device then you must use a converter box. This is a set of electronics that change the protocols and signals. The only adaptor which works is the DVI-HDMI ones.
You can connect your Mac to HDMI displays and TVs using adapters: 1  If your Mac has USB-C: The USB-C Digital AV Multiport Adapter lets you connect your Mac notebook with USB-C port to an HDMI display or TV, while also connecting a standard USB device and a USB-C charging cable. Learn more about using USB-C and Thunderbolt 3 (USB-C) ports and adapters on your Mac notebook.