If you’re looking to download a whole YouTube channel at one time, this is definitely one way that you can do it. WinX YouTube Downloader can download over 1000 URLs. Even more, it has support for different YouTube playlists and channels and even gives you the ability to record your own live videos, so this is one platform that can definitely achieve a whole lot more than you might have thought. On top of that, it doesn’t give you any kind of ads (because who wants to watch those?) and it lets you download from just about any kind of platform and into just about any kind of file.
Many services also offer a feature called versioning. This saves incremental changes you make to files as recoverable snapshots of the file. It's useful in case you need to get back information from an earlier version or if your latest file save becomes corrupted. Services vary widely in how many versions they keep and how long they're saved. Best-in-class services, such as SOS Online Backup and SpiderOak ONE keep an unlimited number of file versions forever.