Although the exact original recording behind this clip is not clearly documented in the soundboard listing, the phrase since day one has long been used online as shorthand for loyalty from the start. On TikTok it fits the platform's tribute and friendship edit format, where a short audio can carry an entire montage without needing explanation. That simplicity helps it travel: creators reuse the same line for friends, partners, teams and pets, and viewers instantly understand the message even without context. Its staying power comes from that broad, sincere meaning rather than a single viral moment.