haha, i know the video isn't great, but you should see some of the junk on there!
and to answer your questions..
1. You here the driver say "where are my keys" and then the pepper shows that he has them, so we're not going anywhere. Perhaps he dropped it in the house because of all the running and stuff. Or maybe the Pepper just mysteriously has them for who knows how. It's a GIANT PEPPER! I think that realism went out the door quite quickly. So either way its clever, well more clever than them just driving away. Originally we were going to have him fumble the keys, but instead he just can't find them.
2. Sorry, we could not afford to hire professional make up artists
3. We were going to thicken the plot, but it is just a commercial. We were going to have the reason be, that they would become famous for doing so. But yea it sounds like your main problem is realism, but once again there is a giant pepper chasing us down because we stole his secret recipe. Also the video had to be 60secs long, so good thing we didnt add anymore to it because we had no time.
4. true.