No, they are not pictures, those are videos. Pictures look something like this:
they are still, they don't move and this is the thread where we chose the ones that we think are funny and we share them here.
However, when you stumble upon a "lots of pictures put together" in a sequence that tricks our brains to believe that it's one "moving" picture and it's usually accompanied with appropriate sound that increases even more our belief that it's somehow "alive", we call them VIDEOS.
And for that kind of media presentation, someone was kind enough to open a separate thread, which is called "Hilarious video challenge", where you can find a collection of "lots of pictures put together" accompanied with sound in a way that makes us believe it's alive and moving, just like the ones you shared the links for in your post above and I'm sure those links of yours would've been much happier there, because.... they feel kind of lonely here... as if, somehow... they don't belong here...??
