tldr:

valve gets a lot of its things leaked to the point u cant even keep up with how many leaks have happened. the joke is the new interviewer probably interviewed for those leaks but the dev told about the water leaks

dev text at the bottom:

so its supposed to be a play on how the news probably went to interview the dev to learn about the game leaks of valve being fixed. but the dev had a very different leak to talk about and was happy that someone was there to listen. news however had to turn it into a clickbait thing, as they do, so the headline they wrote (in the meme so i wrote) was misleading. which is a metaphor for news not caring about actual problems in studios and when they have no choice but to mention them they clickbait.

pink cookie:

so the image of the valve developer comes from an interview where they say show their pink cookie that they say is available in the valve canteen. and make a joke that the cookie is very dense and it takes them 3 days to eat a single cookie. so that clip was a slight meme for a while

(bc im lazy ill copied the last two explainations i wrote on previous post)