Question

What is it called on the internet when the picture is moving

Answer 1

It is called GIF in the internet when the picture is moving.
GIF stands for Graphical Interchange Format. The GIF is a bitmap image format that has come into widespread usage on the World Wide Web (WWW) due to its wide support and portability. The format supports up to 8 bits /pixel for each image . It was introduced by CompuServe in 1987.

Answer 2

The moving pictures on the internet that move and have little subtitles at the bottom are called gifs