Update 2: This error appears to be fixed, and you should be able to log in to the PS4 YouTube app without any issues now. We just tried doing so this morning and automatically logged in to our account without incident.
Update: The PS4 YouTube error code NP-37602-8 is still causing log-in issues with the app on Sony's console. It's "taking longer than expected" to fix according to the latest update from Team YouTube's Twitter account, but that was on 30 May. You might still be waiting for a while on a fix yet.
Still, you can use YouTube on PS4 while signed in. All you have to do is use another device, like your phone or tablet, and hit the 'cast' button in the YouTube app. This will let you control YouTube on PS4 with your phone while you're signed in, assuming they're on the same Wi-Fi network. YouTube confirmed this below:
Update: The fix for the PS4 login issue is taking longer than expected – rest assured our teams are still on it! As a workaround in the meantime, you can cast YouTube to your PS4 device using the cast icon on the mobile app: https://t.co/GVqW7zOnGj https://t.co/X9WEiRukmCMay 30, 2020
Original story: If you've tried to use the YouTube app on PS4 recently, you've probably noticed that you're being signed out, and that signing in again prompts an error code: NP-37602-8. Searching PlayStation Support when you get the error prompt yields no results, which is annoying, but now the issue is known to Sony and YouTube and they're looking into fixing it.
YouTube tweeted out the following, which was retweeted by the Ask PlayStation help account. This hopefully means it'll be fixed in the near-future – keep an eye on the account for more updates.
If you're experiencing issues when trying to log into YouTube from your Sony PlayStation 4 device – we're on it! We've seen similar reports and our teams are looking into it. We'll circle back with updates soon! Thanks for your patience in the meantime.May 29, 2020
Can you fix the error code NP-37602-8?
As noted by our friends at GamesRadar, there is no fix for this specific issue at present, but there is still a way you can watch YouTube on your PS4 using your account. You can simply cast YouTube to your PS4 from a linked device on the same Wi-Fi network, like a phone or tablet. All you have to do is open the YouTube app, click the cast icon then select your PS4.
We've tested this solution and it indeed works as a temporary fix to the NP-37602-8 error code. Until a proper fix comes, that gives you the ability to watch YouTube on your TV through your account.
Which YouTube video did we watch to test this fix out, you ask? Well, it was this funky remix of Le Cassette's Radio, because we never truly got over the synthwave movement.
Look out for a proper fix in the coming days.