The cops in Peru just wanted to cheer up the people, and guessing they like memes there too.
Found out about this on Cracked Pictofacts in their article Amusing Moments Brought To You By The Rona. This one seems to have got brushed aside with the whole pandemic thing, as didn't see anything about this in Know Your Meme News, just a video about it. Both Cracked and Know Your Meme put the original source as the BBC, which seems like the type of publication that is not able to fully appreciate the significance of what is happening in the video.