Get your hanky at the ready, because this latest video zooming up the popularity charts is a real tear-jerker.
It captures the moment that a baby called Jonathan, who's just been fitted with a cochlear implant, hears his mother's voice for the first time:
Jonathan's face beams with joy as he recognises his mother speaking to him. No other information has emerged yet about the family, but let's hope that that baby Jonathan is progressing well.
More than 112,000 people worldwide have received cochlear implants. A cochlear implant is a tiny surgically implanted electronic device, and while it does not restore ordinary "hearing" as such, it does provide a sense of sound to the brain.
Over 1000 children are born deaf in the UK every year. Not every child will benefit from an implant, but for those who will, the implant is usually given at a very young age to help them learn language.
To find out more about cochlear implants, have a look at the National Cochlear Implant Users Association website and the Cochlear Implanted Children's Support Group.
Source [ParentDish US]