I think it depends on your country. Because some countries' government prohibited them.

By watching videos in internet

I think Bendit is a scam ICO. Don't invest to it.

You can do facebook ,twitter bounties. But I think today we can see many airdrops. So you can join airdrops and you will receive tokens. Also you can share your affiliate link & get more tokens. 

Bitcoin is the king of cryptocurrency world. It is the major one. But in the future other alternative coins like eth,xpr.... will come to the bitcoin's place.