I have same issue. About 3 weeks ago, the video didnt work only netflix and youtube app. I shut down my phone. Unfortunately, it wasnt perfect solution. I also did reset all settings. It seemed to have solved problem completely, but I get same issue now. I want to know which thing occurs this problem, with apps or IOS? No matter what it is, it needs to be updated.
(2) If somebody with mutual trust will let you borrow their iOS13 device ( I did this), Have them log out of their apple/icloud account in the settings like above. Let it save their info onto the device just in case. Log your account onto their device. Don't merge contacts or anything. Just go to app store & "Purchase" netflix & any other iOS13 only apps. Then go log out of your iCloud & let them re-log in their device. Now on your iOS12 device, when you try to download Netflix in the app store it should say "an older version is available"
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