The "OLED" tag in this IPA file refers to a specific visual modification designed to take full advantage of displays found on modern iPhones (iPhone X and later).
For more on this topic, you can explore discussions about modified IPA files on community platforms like Starfiles. YouTube--OLED--v.19.02.1--uploadedBy-ipabnb.ipa - Starfiles
YouTube does not have an official “OLED” version marked v.19.02.1 . The public YouTube iOS app versioning follows a different scheme. Any file named YouTube--OLED--v.19.02.1--uploadedBy-ipabnb.ipa is a third-party modified build, not an official Google release. The "OLED" tag in this IPA file refers
These tools require a computer and use your Apple ID to "sign" the app for a 7-day period (for free developer accounts). YouTube--OLED--v.19.02.1--uploadedBy-ipabnb.ipa - Starfiles
Your Apple ID, Google account, and personal data are worth more than a free modded app.