How much energy does auto playing all videos consume daily?

I looked into this a while ago, and found out that streaming (server), data transfer, and receiving (client) all together consume just a fraction of the electricity that the screen displaying the video consumes. Most of the electricity is consumed by the screen.

One caveat: Some companies might run very elaborate prediction and machine learning algorithms every time they show a web page, to recognize and classify the user and to predict and decide what content to show to the user to maximize click probabilities. I don't know how to estimate how much these can consume electricity.