Community reviews from platforms like Reddit's r/LegacyJailbreak suggest several paths for maintaining "extra quality" (high resolution and ad-blocking) on older devices:
Finding a high-quality YouTube IPA for legacy versions like iOS 10.3.4 can be challenging since the official app no longer supports these older operating systems. Most users seeking this specific setup are looking to revive older devices like the iPhone 5 or iPad 4. Recommended IPAs for iOS 10.3.4 youtube+ipa+for+ios+1034+extra+quality
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