I don't think that's the case as they are allowing Can I Stream It? to stay up which is specifically for seeing what streaming services (including Amazon) offer particular titles.
He's referring to the special methods available to classes that allow implementation of the truth value of an object. In version 2.x of Python, this method is __nonzero__[1] and in version 3.x it's called __bool__[2]
Every time I see that word it makes me cringe. It sounds like a disgusting bodily function. I wish we could all decide to let this "word" die in peace.
That's an interesting question. I wonder if it's not also social habit as it would be somewhat awkward to try to talk to someone's feet or if they were sideways to you.