Another variation features an uncle returning from military service or a long absence, standing back to surprise Ashley at a school event or family gathering.
A common version shows an uncle seeing his niece, Ashley, in her prom or wedding dress for the first time. The "standing back" part refers to him taking a moment to absorb how much she has grown, often followed by a tearful hug. Ashley & The Uncle - Standing Back.mp4
If you are looking for a specific video that you saw recently, it is likely a where the uncle is witnessing a "coming of age" moment for his niece. The Animals' Version of House of the Rising Sun - Facebook Another variation features an uncle returning from military