Youtube--oled--v.19.02.1--uploadedby-ipabnb.ipa - Starfiles [Mobile Genuine]

An .ipa file is an iOS application package. The name suggests this is a modified version of YouTube, tweaked for “OLED” (likely a black theme or power-saving mode for OLED screens).
Modified IPAs distributed outside the official App Store usually:

Like most YouTube IPAs (such as the popular Cercube or YouTube++ mods), this file likely unlocks features usually reserved for paid Premium subscribers. YouTube--OLED--v.19.02.1--uploadedBy-ipabnb.ipa - Starfiles

A short, engaging blog post exploring the mystery file name, what it might mean, and why it’s interesting to creators and power users. what it might mean