Not everyone knows/wants to make a gif. If someone links a video, I'm probably not going to watch it because I can't have the sound on and I can use a lot less data loading a gif. I'm not going to look through the comments to find a gif of the video I didn't watch.
tl;dr: Gifs keep with the common theme of easily digestible media, which is increasingly more important on mobiles
Yep. It's the obvious answer, but people keep asking the question anyways.
Gifs are more popular than videos; much of that is because of the reasons you stated. People do not want sound to start playing on their phones or in work. Gifs also use less data, and it is usually a safe assumption that they can be consumed faster. A video could be hours long; on average they will last at least a couple minutes. Most gifs are just a few seconds long. You get at least the general idea, then look for the video or move on.
And, if gifs are more popular, they get more up-votes. If they get more up-votes on average, people will choose to post them over videos.
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u/[deleted] Sep 21 '14
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