Jeff Bezos, Mark Zuckerberg, Tim Cook and Sundar Pichai were grilled in congress about everything from conspiracy videos to app pricing. Here are the big moments you need to see.

EDIT: The original version of this video said Amazon, Apple, Google and Facebook had a combined value of $4.8 billion -- this should have said $4.8 trillion. We’ve removed the error.

Subscribe to CNET:    / cnettv  
CNET playlists:    / cnettv  
Download the new CNET app: https://cnet.app.link/GWuXq8ExzG
Like us on Facebook:   / cnet  
Follow us on Twitter:   / cnet  
Follow us on Instagram: http://bit.ly/2icCYYm