You can download YouTube video and other content,file,video on computer and android device.There is many format as you wish which format you want download like MP4 360p,MP4 480p,WebM 360p,FLV 240p,3GP 240p,3GP 144p,Audio MP4 128.
Read this method for computer
Copy url link which you want file or video download and paste.
Click this link and paste here your file or video link
If you do not like copy and paste link just change something in link you automatic redirect to download page.
Your YouTube link is like this “https://www.youtube.com/watch?v=4i5DQjhdge“
You need just change to like this remove www. and write ss “https://ssyoutube.com/watch?v=4i5DQjhdge” then you automatic redirect to download video page.