If I remember correctly, I researched these a little when I was looking into setting up ATMs and I think that from each individual ATM you're not going to make a high enough return on your Investments, but if you have many ATMs spread out, once you add those profits together, that's where you start to see that it's worth it. Not sure if it is the same thing with vending machines though.
I do like the idea of being able to put whatever you want inside the vending machine. I'm a pretty creative individual, so I wouldn't want to be directly tied to a company where I could only put in Coca-Cola products for example. I would preferably have a vending machine in Japan (primarily for safety reasons, and because I know that the culture over there is already so used to buying things from vending machines). I don't really like the idea of being able to pay with Apple pay or credit cards. When it comes to vending machines I would rather just count Straight Cash. However, as long as my readers on my machine are not messed up though, then I guess having a cashless vending machine would drastically limit any sort of theft.
I'll have to come back and look at the video when I have time. I live in New York City, so right now finding the space for a permanent vending machine would be highly problematic and expensive, but I'm not shut off today idea completely.
