In tests, I had to make a switch from MP4 to MKV format to get my test video to download in 4K. 4KVD snagged the 579.4MB file in about 43 seconds. It defaults back to 1080p HD, so I made the same switch when downloading an Ultra High Definition (8K) playlist. If you enable the Smart Mode and its pre-sets, 4K Video Downloader can then do one-click downloads to your favorite format. If you want to download more than 25 videos at a time or subscribe to YouTube channels to instantly download the latest, that requires the $15 paid version. Playback of the MKV file via VLC Media Player was flawless.
Bitcasa Infinite Drive is relatively new, but it's one of your favorite cloud storage providers in general, mostly because they offer virtually unlimited stroage for syncing and backups. When we say unlimited, we mean it—some of you are using terabytes of storage with Bitcasa. It's not primarily a backup service though, and while it was built for file syncing and storage, the Bitcasa desktop client does support regular file backups. Bitcasa supports Windows and OS X, and encrypts all of your files before uploading so they stay safe from prying eyes. Bitcasa even keeps revision history, so if you've backed up a file multiple times and need an older version, you can pick it out and restore it. Plus, you can use the Bitcasa mobile apps for iOS, Android, and Windows Phone to access your data on the go.