Re: Does this seem legit?
Wow, I only watched the first couple minutes, but its total BS. Grand Nain is not particularly quick, in fact nowhere near the quickest, and is not a good choice for container growth. The plant they show with fruits are fake fruits. Having them crowded so dense like that might look good on TV for slinging snake oil, but is terrible for trying to actually get fruit.
If you are starting with a small tissue cultured plant as they show, under ideal conditions in the tropics it still takes about 12 months. In a container in temperate areas as a permanent or partial house plant, expect 2-3years, if at all.
Growing bananas in Colorado, Hawaii and Washington since 2004.