maybe, being a US made video and being shown to US citizens, they wanted to predominantly use American products** in the video they made themselves , for themselves.
I happen to agree with that stance, if it was me, I would have had someone shot if they made the video with foreign products, but then again, I do have evil-dictator tendencies !! ;-)
** i did not check every other product in the video to see their origin, but Edison was American