A close-up of a Radial Highline Stereo DI box.

The video shows a person assembling a pedalboard for musical instruments. They start by placing a Radial Highline Stereo DI box onto the pedalboard. Then, they demonstrate incorrect methods of securing it, first with zip ties and then with a hose clamp, both marked with a red 'X'. The correct method is shown using a specialized mounting bracket, which is then attached to the pedalboard with screws. The video concludes with a montage of various Radial DI boxes mounted on pedalboards, ending with the Radial Engineering logo.