Here's a five-minute cut of Adam Curtis's documentary about being trapped in a system of your own likes and tastes. Wonderfully done and very alarming.
"You spend your days and nights on social media. The original vision was that it was going to open up a new paradise where info was shared freely But now, the algorithms are so strong and know so much about you that they only give you what they know you like. You have become trapped in an echo chamber. But all you see and hear is you.