You can still do that with daily, weekly, or monthly checks.

Nobody under any circumstances needs usage stats with 5 minute resolution. And certainly not a screen recorder.

That's stretching my definition of "good" quite a bit.

You definitely can, although it would be unlawful under the GDPR without user consent, so you could never release the figures publicly.

It wouldn't if you're not tracking user identity.

Websites get this data pretty much by default and they don't need consent for it.

If you're deduplicating via IP or any other identifier, then it will be subject to the requirement for a legal basis.

How so? You could just store a hashsum instead of an identifier.