This reminds of Rewind [1]. I'm not affiliated to them in anyway, but I have been using their product for a few months and finding it quite useful. Their approach of screenshotting everything and saving it locally is more convenient for me, at least.
We simply found that there were things we didn't want in our first brain, let alone in our second brain. That's why we've taken a curated content approach.
Rewind captures everything, while Zenfetch only stores the content you've explicitly saved to signal there is value.
I don't need to be reminded of the accidental clickbait article I've opened :)
I think the data capture, compression and storage is, but the AI part isn't. If I understood it correctly, the latter is done by sending data to ChatGPT.
[1] https://www.rewind.ai/