I want to know the answer to the following question:
When did youtube finally become available on the Playstation 4?
All the background I'm provided with is that "In January 2009, YouTube launched "YouTube for TV", a version of the website tailored for set-top boxes and other TV-based media devices with web browsers, initially allowing its videos to be viewed on the PlayStation 3 and Wii video game consoles.". Is that enough to answer the question?