I think the benefit of mapping the world by languages (and color-coding it) is largely educational.

The previous version of Language World Map is used by universities and schools alike, largely I believe to outline the impacts colonization had.

I also see some people using the map for its original intended use: To visualize the benefits of learning multiple languages. :)

I tried but the thing is, at that point everything is so laggy it's not even worth it

Laggy? That's doesn't sound right, especially HDMI. Disable screen mirroring and only have the content play on the TV screen (so your computer is not rendering it twice), maybe?

Or play it with VLC.

Or downscale any 4K content to 1080P. Maybe your CPU/GPU can't handle that resolution.