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. 
Depending on how many videos you have in your channel and what your video quality is like that you uploaded and everything, this could be a really large file. So give it a lot of time to prepare and then to download. And make sure you have plenty of disk space on your computer to save all of that if it is a really large file. If I went through this too fast or you want to have more detailed instructions, I’ll put a link in the description below this video that will take you through a step-by-step walk through details of how to download and archive your entire YouTube channel, if you want to back it up and save for later.
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.
Step 3. Next, the program will start parsing the link. If the number of videos in this channel or playlist is more than one hundred, the software will automatically download all videos (in the highest quality by default) after parsing; if there are less than one hundred videos, a window will pop up. At this time, you can select video resolution, whether to download subtitles and video cover, or convert all videos to MP3 audio, etc. After confirming, press the download button.
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.
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.
It may take some time depending on the number of files you have and the total size. You can use the "Email me when done" option to get notified once the archival completes. You can then download the created archive locally. Make sure to download it to your Google Drive shared folder or copy it there after download so it gets synced and backed up in the cloud.
This rule, to be carried out this month, applies to all the YouTubers, regardless of their location or their content (even if it is directed towards a mature audience). This sudden declaration has caused quite a big conundrum in the virtual world. According to the rule, YouTube can demonetise the content of YouTubers who fail to follow it and might even get fined.
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