But after you have logged in, then go to Google Takeout, that’s at google.com/settings/takeout. Confirm that your channel’s icon is the one that’s displaying in the upper right corner of the screen, and then select the Google products that you want to archive and download for your backup, including YouTube. Then click Next, and then Create Archive. You have to wait a little while for the archive to be created, and then after that you can’t download all of your data.
Backup services vary widely in how they set up and perform backups. For example, the totally hands-free Backblaze automatically encrypts and uploads all your important files without any input. On the other hand, services such as IDrive and Acronis True Image let you choose specific files you want from a file tree. Note that some services restrict you from backing up specific file types or using particular sources, such as from an external or network drive. Make sure the service you choose supports all your needs.
Bitcasa starts you off with 10GB for free, but $100/yr throws the floodgates open and gets you unlimited storage for anything you want to sync, share, or back up. Plus, you can connect as many computers or devices to your account as you choose, so you don't pay by the PC. It's client isn't quite as robust as some of the other tools here, but if you're more interested in a flat fee for unlimited space and you can handle the details of which files go where and when, it's a solid option. You can read more about Bitcasa's pricing here.
If you want to download as videos itself, you can use other free tools like Free Youtube Download to download all videos with a single click. Please be careful while installing this tool as it optionally installs a browser toolbar and modifies search preferences. So please make sure you read and uncheck the optional checkboxes while installing to avoid surprises in your browser. 
The next page will show a list of all Google products associated with your account whose data can be backed up. All of them will be selected by default, so make sure to unselect all and select only youtube. An easy way would be to untick the "Select All" button at the top which will unselect all items. Then scroll down and check the "YouTube" option.
Jihosoft 4K Video Downloader not only helps to download YouTube videos and channels but also allows you to convert your videos from one format to another in a matter of minutes. This function will come in handy if you are having trouble to play your videos in your available media player due to compatibility issues. The steps to convert your videos are as follows:

Some services go above and beyond, including extra capabilities that improve the experience. For example, a few offer disk courier services for bulk uploads and restores via an external drive that the company ships and manages. A couple of these services throw in a local backup component, too. If you go that route, you should take a look at our roundup of best external hard drives. Some of these services can even track your device's location and let you remotely wipe it in case it's lost or stolen.
I just have a doubt i got a new 32 gb sd card so i wanted to share my youtube offline videos from my previous 16gb sd card so i should just copy and paste the folder “Android” from my old to new sd and open my youtube app by inserting my new 32gb card where i copied the folder. Then can i get all my youtube offline files just as same as with my previous 16gb card?
Here at BestBackups, we put together all of our Top Backups lists with the aim of introducing our readers to the best online storage and backup solutions available. However, due to the varying needs of consumers with video files, the best services to backup videos roundup was made taking a slightly different approach to our standard 1-5 ranking. Instead, we focused on a few key features that we believed ticked all the most important boxes and drew attention to the services that do them best.
With the WinX YouTube Channel Downloader, you’ll need to download their software before you do anything else. Now, this system does have a paid version, or you can check out the free trial first. You get to choose the URL that you want to download and it can auto-detect all of the information about that video, including the format and size and even the resolution. But you still get to make the final determination. From there, you just click the button to download, and you’ll be ready to go.