Previously there were lot of applications like Youtube Downloader to download vidoes from Youtube.
But Google had made such downloads – as illegal. Hence they removed all youtube downloader apps from Google PlayStore.
TubeMate is an application that still exists for downloading youtube videos.
But this app is not available on google play store. You need to download it from external sources.
Here is the link to their official website – http://tubemate.net/
Download the latest version. As of now – TubeMate 126.96.36.1990 is the latest.
Beneath that, various site sources where the software is available will be displayed. You may download the app from anywhere you like.
Direct Link (if you are lazy) – https://www.apkmirror.com/wp-content/the…?id=705781
Note : To download softwares outside google playstore in your phone, you need to – Go to Settings -> Security -> Allow downloads from external sources. (Each phones have different settings. So play wise to find what to do).
How to use?
After you download and install, Open TubeMate.
There will be a notification to download an additional app called – Mp3 Cutter.
Its a Playstore link and you can download it without any trouble.
You will see the Youtube homepage. Select any Youtube video and click on the red download icon (right bottom corner of the screen).
Select the quality or format of the video (I usually select mp4 – 240*360 to save data).
The download will begin.
If you swipe left, will see the download progress.
Later, you may view the video in Gallary or Browse file-manager.