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.
The new HDMI version of the Streaming Stick requires that you plug it into a power supply (either your TV's USB port or a wall socket). The device has a micro-USB port, and comes with a USB power cable and wall adapter. There's also a reset button near the micro-USB port.