There are a few reasons why Youtube might not be working on your Playstation 4. One reason could be that your Playstation 4 is not compatible with the Youtube app. Another reason could be that you have an outdated or unsupported Playstation 4. If you have any of these problems, please check to see if there is a firmware update available for your Playstation 4 that might help fix them. Finally, if you are having trouble streaming videos on your Playstation 4, it might be because of something called “3DMark Vantage.” This is a test that Youtube uses to measure how well your video encoding and decoding is performing. If 3DMark Vantage shows any problems, then it might be because of something else going on with your PlayStation 4 and YouTube will not work properly until this issue is fixed.