I left 360p youtube playing for 18hrs and it used around ~18 gb.
I don’t have unlimited home internet so I have to keep under my limit and I assume this applies to a few others.
Maybe this is unpractical, but what I have done when traveling to areas where I wouldn’t have data:
Use android newpipe app to download youtube videos onto my phone. With wifi I Download a whole bunch of videos that I would normally watch when bored, while doing chores whatever. Then after a couple of days when I am really bored I watch them.
When I am on data newpipe also shows how big a yt video is to download. So I chose a low quality, maybe only audio (ogg), depends on the video and download that. A couple of hours of audio only is just 60mb or something like that. Video is more, but not too much on very low bitrate.
So maybe you know of a free wifi somewhere? Do you neighbors have unlimited data? It’s pretty easy to share and maybe a little bit of money or a case of beer is going to incentivize them.