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.
BackBlaze doesn't have an offline component, so you'll have to handle that yourself, but it's by far one of the most affordable options on the market. Accounts are $5/mo (you get a break if you pay up front for one or two years), and you can add more computers to the same account for another $5/mo. You can read more about Backblaze's pricing options here.
The final option is a free YouTube channel downloader that can download from a range of different websites that include Twitter, Facebook, Vimeo, and Instagram, among others. Plus, TubeGet gives you options on the specific resolution that you want to use for the videos and even offers different video formats. All of these things mean that the video you end up with is going to be exactly what you’re looking for, without you having to settle for anything else along the way. It even gives you the option to download those videos as an MP3 so you can listen only to the audio if you prefer.
Jihosoft 4K Video Downloader is available as a completely free system that actually works for both PC and Mac users, but there’s a paid version as well. What’s really great about this YouTube video downloader is that it actually works for just about any kind of video you want to download, whether that video comes from Facebook, Instagram, Twitter, SoundCloud, or YouTube, so you’re not stuck with just one platform. You’re also going to have the option to download in just about any resolution and still get all the audio and subtitles that usually come with the video. On top of all that, you can convert to any video format or even MP3 audio, so you’re always able to watch (or listen).