A couple YouTube tabs are enough if you leave them running for long enough. Just one YT browser process will easily take up 1-4GB sooner or later.
A couple Facebook Marketplace tabs that have videos of the item for sale would absolutely crush my 2017 MacBook Pro.
My M1 Air would slow down a little, but was still usable doing the same thing. And they both had 8GB of memory.
Or it won’t because Chrome and MacOS will know how much RAM is available and manage it effectively.