You could say that Walter is mildly excited about going swimming.

Walter is cute, at least what I can see. I alway cite the source if it's possible to find it, and if it's not I almost never post it. I've never actually posted anything on Reddit that I found on Reddit, but due to the crappy nature of the search function in the subs, and the lack of any official viable reverse image or video search, sometimes, like with this video, it ends up being one that has been popular in the past. I searched r/aww but the number of possible search terms are out so vast, and r/aww has so much content, it's just not practical in many cases to try and find it. I also used KarmaDecay to search the link of the video, and then converted it to a GIF and tried that as well. Even if you use the link for this post in KD it comes back with nothing but this post. KD is far from perfect, but usually if a post was highly popular in a default sub and makes it to r/all it will show up. Since I'd never seen it I had no reason to believe it was posted before.

/r/aww Thread Parent Link - v.redd.it