Workable for hobbyists. Not for grandparents. Requires patience and a willingness to read GitHub documentation.
Sites like iPhoneCake , iOSOasis , or Archive.org host legacy IPAs. Look for through 14.11 . Always scan files with antivirus—malware in IPAs is rare but possible. youtube ipa for ios 935
Distributing IPAs is a legal gray area. Because iOS 9.3.5 devices cannot run modern YouTube (which violates YouTube’s ToS), the community generally views this as "abandonware." However, you are technically breaking the DMCA by circumventing Apple’s cryptographic signatures. Use at your own risk. Workable for hobbyists