In many cases, it's possible. But you need to make sure the platform supports GIF uploads and that the GIF meets the size and content guidelines. Some platforms might have restrictions on certain types of GIFs or only allow them from specific sources.
In most cases, yes. However, make sure the platform you're using has the functionality to handle GIF uploads. Also, check if there are any specific guidelines or limitations related to the content or format of the GIF you want to post.
First, you can choose some key scenes from the story like Atreyu on his horse. Then use a video editing tool to cut and loop those scenes to make a gif.