No.
I use VLC for this.
We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time (tm) ). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.
No.
I use VLC for this.
Not illegal, but against their terms of service. Worst they can do is ban you; you’ll be fine.
I've got about 4tb of youtube videos downloaded and haven't had any issues yet
Write down a list first of what you want, then start downloading.
This question probably depends on your country. I think in most countries it is legal, even if they forbid it in their terms of service.
No, every time you watch a video you actually download it in chunks. It’s illegal to redistribute the said video or make money off it without permission from the creator. That’s called stealing. Apart from that you are free to do whatever you like, YT ToS might say otherwise but thankfully Google isn’t an authority yet.
That’s called stealing.
"Copyright infringement" specifically (though ianal).
Actually U.S. courts make a distinction between “streaming” which is temporary and require a connection for every repeat viewing and “downloading” which stores more permanent version that can be watched without an internet connection.
The YouTube ToS allow you to stream videos. They restrict downloads. If you break that, your “cached stream” isn’t legal to begin with. It’s like going into a store giving free samples and taking a box full. You have to follow their rules, or the legal system may rule against you.
Not that it realistically matters for personal local copies. Who knows, there can be a possible fair use exemptions in certain cases.
It's literally why the site exists?!
Who cares? And who would even know?
Uh...Youtube knows. Lol
The correct question would be to download the videos without the webpage and the ads.
Super illegal. Like 10 years maximum security prison stuff man. /s