Unfortunately for them, AI is a double edged sword. AI can trivially scrape content from a screencap. And there are thousands of residential proxies that can’t be defeated even by companies like CF.
If you have residential proxies, you don't need AI to scrape via video, you have the HTML already.
Companies spend thousands of engineering hours building elaborate mechanisms to obfuscate JS, protect APIs, apps, trigger captchas, and hide content, all of it completely powerless against the current gen of AI tools. If a human can read it, a bot can.
Those same companies often invest in accessibility for vision-impaired users. I'm not sure you need a screen capture to scrape content when the site is designed to be navigable with a screen reader.
Surprisingly chatgpt is not accessible via screen reader, their captcha is purely image based.