Wouldn't it surpass the flicker if you're recording at 60fps and the lights flicker at a multiple of that (ex. 120Hz in the USA)? At least that's my experience recording CRT monitors - you set it to a multiple of its refresh rate and the flicker is gone from the video.

Like back when CRTs were mainstream you'd have those computer labs with monitors set to 60-85Hz and most people wouldn't notice, but some would. I definitely did, I couldn't stand looking at a CRT set to less than 100 Hz for more than an hour.

The easiest I can think of is making a spreadsheet. Share an Excel file over OneDrive or even a Google Sheet. The built-in features/formulas are enough for most of these use cases; if you want to go further, there's VBA (and the nightmare that comes with it - but it's less of a nightmare than paying and setting up a domain and dealing with the security of that).

I know several people who do that - non-programmers - with formulas and VBA in Excel sheets.

If you can get over the critical errors. That's the showstopper for most non-programmers. Perhaps not as much for the so-called "power users" who can hack together some Excel VBA, but even then there's a lot of setup to get simple projects rolling. Down to the little things like knowing that a .js file is a JavaScript file (and what that means). It's obvious to us, but definitely not to the average person, unless they're willing to invest significant time into it - which most aren't.

There used to be a large public tracker running on .si, used widely in Slovenia where .si is from. Almost everyone who's been online in the last 20 years in Slovenia knows of or has used it. It also didn't disappear because of legal notices.