It looks like you can't upload a video because an error has occurred while linking your YouTube account to your Sony account.
Click here and sign in with the Google account that is registered on your PS4.
Once you are signed in, go to PSN and select Revoke access.
Next, you'll have to go to your PS4:
- Go to Settings > Account Management > Link with Other Services > YouTube > Sign-In and link the account again.
- Finally, go to Notifications > Uploads and try uploading your video again.