To enjoy yourselves doesn’t require that you all buy the latest gaming rig or even something new or identical. As long as what you decide on has games in common, you’re good.
Unless something has recently changed, I was unable to play music that was downloaded inside YouTube music but refused to play if there was no internet access.
For the same reason that YouTube music refuses to play offline content stored on your phone until there’s a live internet connection - particularly helpful when you’re outside of coverage.
That reason is that you are the product and playing without being tracked doesn’t make any money.