Hello guys,
Here is Gavial Tutorial to give you easy solution.
Today I will tell you the secret of making awesome and attractive thumbnails.
Without a custom thumbnail or an awesome thumbnail you will not get too much views. So let me show how to make a custom thumbnail for youtube videos.
Go to canva.com and sign up for free. Now find more button in the right corner. Here your find some logo. Go below and find out youtube thumbnails. Click on that button and select a theme for your thumbnail. Now edit it as you want.
Here is my video tutorial on how to make a custom thumbnail for youtube videos.