@TeamYouTube thanku for your help and reply me but my problem is not solve i clear all cache and cookies and update my chrome browser but my recently post video thumbnail is not showing help me.pic.twitter.com/zLigb7QISk
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Make sure your account is verified and see our recommended image size & resolution for custom thumbnails: https://goo.gl/T0AbeJ . Keep us posted!