Consider using the mobile website m.youtube.com in Safari instead — it’s slower but more reliable than the ancient app.

Here’s a solid, informative post tailored for someone searching for — suitable for a forum, blog, Reddit, or tech support site. Title: How to Get an Older YouTube Version Working on iOS 9.3.5 (iPhone 4S, iPad 2, 3, Mini 1)

If you’re still running iOS 9.3.5 on an older device like an iPhone 4S, iPad 2, iPad 3, or original iPad Mini, you’ve probably noticed the modern YouTube app won’t install or keeps crashing. That’s because newer YouTube versions require iOS 12 or higher.