Prepare for an overload of cuteness.
When this 6 year old boy holds his newborn baby brother first time he sings him a lullaby so sweet that it'll make even the hardest of hearts burst out in tears. At first he doeskin realise he's being filmed, but even when he does see the camera he carries on, this is what you call brotherly love. It really does have to be watched for you to realise how cute it is.
For anyone wondering, the song is John Denver - No One Like You.