Youtube is the most wonderful creation of google iam using the youtube to my early childhood. I used to spend more than 5hourse of my day by watching videos on youtube.it is the best way to increace knowledge any topic or any products. It has large no. Of videos which are useful guieds for many thinks( almost everuthink) anyone can use this app who have the internet connection. U can also upload your videos on the youtube by creating you own chennel on youtube