What Do Aliens Look Like?

Aliens in TV shows and movies often have the same size and shape as human beings, which correlates somewhat with the production's budget. But in the real universe, we have no idea what alien life would look like, even intelligent life. What if intelligent life already exists, but those beings are so different from us that we can't even recognize that they exist, much less what they are like? They may know we exist, but why would they bother to communicate with us if we are no more important to them than insects are to us? Kurzgesagt gives us some food for thought.