I agree with you that Youtube is a great social media platform which not only help us with studying but also entertaining. Several years ago, i spent hours and hours on Youtube having watched all kinds of videos which were recommended for me. Gradually, i am more busy with university and part-time job so i have less time for relaxing so i want to spend my free time productively, that's why i select only videos in English appear on my Youtube, i subcribe only English-speaking videos form animations to news. At first, it was quite hard to cope with the content then soon got bored. However, i have my motivation so i overcame the first hard step and got used to it now. Moreover, I also have Facebook but seems I soon get rid of it since i find that Facebook turns to be time-consuming and there're some inconveniencs.