The phrase factors to a particular model of the YouTube software (model 19.16.39) probably sourced from a third-party repository often called APKMirror. APKMirror is an internet site that provides APK recordsdata for Android functions, permitting customers to obtain and set up app variations that will not be out there by way of the official Google Play Retailer. This may embrace older variations or variations tailor-made for particular units.
Accessing software variations by way of different sources like APKMirror could be helpful for customers who require a specific model on account of system compatibility points, function preferences, or to bypass geographical restrictions or staged rollouts of updates. Traditionally, such repositories have supplied entry to software program iterations faraway from official distribution channels or these not but formally launched.