Very good video! RROAMM I do use the Aluminum tape. On the video he tapes the trash can lid which is 100% right, but I will tape the bottom of the trash can and the two handles were there maybe very small openings.
Also in the cand you add the lid lined with cardboard inside like what my image has. Then to add more protection put the radio, batteries, etc in small boxs. Some people put a clear plastic cling wrap around each small box and then add aluminum foil around each box.