I am wondering a few things. The corn stalks I am familiar with can reach 6 feet tall. with that in mind I was wondering if you were planing a support system so they don't topple over. it looks as if the growing containers that will support the plants are about 6-8 inches deep. I was also wondering how many plants you were planing to grow in each container. I see in the video they seem to be just a few inches apart but I have no experience with corn yet.
I understand your purpose of growing corn is different from mine. I don't know how many plants would be able to grow that close together and if it would be economical for me. I did see something in the background of the YouTube video (about 1/4 way through it) that gave me a similar Idea. The mini pool with plants growing in it. I don't think I would use that as a flood and drain system because of how many gallons it would take, but as a
drip system I think it would do nicely. Provided the
growing medium did not cost an arm & leg.
I have not done the research on it (even though it wouldn't be hard) but as I remember you get somewhere between 3 and 5 ears per stalk. Considering how inexpensive it is here during the season, the cost of operation is of big concern to me. If it costs much or more to produce than to buy it wont be productive for me to do so (even though freshness would be a plus). Also, I would guess that corn is a heavy feeding plant.