Big Tech = Technology developed and owned by "big" corporations (e.g., Google, Microsoft, Amazon, Apple, Facebook, Twitter, Zoom, ...).
The following videos (click on each image) highlight important features, in chronological order, of the past and future of the web, respectively the web ruled by the big tech and other corporations (i.e. centralized, called web 2.0) and that governed by the people (i.e. decentralized, named dweb or web 3.0). For some background, I suggest the 3 min. reading of the principles of the decentralized web. If you like it, you can ask for your name to be added to the list of supporters shown in the website.
How Internet Censorship Works
Why You Should Delete Your Social Media Accounts
Why I´d Never Use Zoom App
Make the Web Ours Again
image source: https://decentralizedweb.net/about/