I have been watching videos on youtube when I started learning about computer , I used to watch new lessons and chapters and lots of thing , even it is my personal teacher, whenever I have some problem on study I always found the solutions on youtube, but one thing I must say that it consumes lot of data , as far as I know youtube consumes more than 1 to 1.5 GB for 1 hour videos , and the rest is good if you have wifi connection then it is quite good for you , concept is very good and becoming better with new updates .