The micro blogging social media and social networking service decided to ban the animated graphics format knows as ِِAPNG From its platform, after an attack has being made on the Epilepsy foundation and affected some people with sensitivity to motion and flashing imagery.

So no more animated photos when tweeting ,for the safeguard of the app 🙂
alternatively adding multiple animated images to a tweet using animated PNG files can be the replacement of the APNG as disclosed .