Adding pictures to your GitHub readmes is a great way to highlight a feature and make it more professional.
-Create an images/ or pictures/ folder in your repo
-use relative paths to insert a markdown image

GitHub doesn't support markdown image sizing, but DOES allow the HTML img tag
❮img src="images/you-picture.png" ❯
Then you can add width and height attributes
❮img src="images/you-picture.png" width="100" ❯
-Only specify 1 attribute to maintain the aspect ratio
On this page of the site you can watch the video online GitHub Readme Images Tutorial (screenshots in readmes) with a duration of hours minute second in good quality, which was uploaded by the user TanUv90 07 April 2017, share the link with friends and acquaintances, this video has already been watched 228,079 times on youtube and it was liked by 2.9 thousand viewers. Enjoy your viewing!