Youtube has been estimated to have an amount of data in the exabyte range: https://www.quora.com/What-is-the-total-size-storage-capacity-of-YouTube-and-at-what-

Youtube has been estimated to have an amount of data in the exabyte range: https://www.quora.com/What-is-the-total-size-storage-capacity-of-YouTube-and-at-what-rate-is-it-increasing-How-is-Google-keeping-up-with-the-increasing-demands-of-Youtube%E2%80%99s-capacity-given-that-thousands-of-videos-are-uploaded-every-day https://www.quora.com/What-is-the-total-size-storage-capacit... This was a few years ago, so it might be possible that Youtube has more data than what can be addressed with a 64-bit value.