Are these sites good for views?

Hi, I uploaded a video on YT and got some views on itusing u2bviews and it was good, In few days I got good amount of views to my site. I decided to get more views using other tools like addmefast and Empire views but I had noticed that no more views arrived on my site. I've read Addmefast's YT views are not good for ranking a video so I don't use it anymore. Is empireviews a good one? Where to get other good views to rank my video in Youtube? Sorry for my bad English and for the noob question, I'm new to this things. thanks.

If you want views that is good for ranking you should look for high retention views. They are pretty rare at that type of exchange sites so better look into buying them.

Enhance Views has high retention views. They cost a load of credits though. I have used views on 300 second lengths and you can even upgrade your account for 250,000 credits to a gold account and instead of sending 250 views at a time, you can send 1,000 views at a time.

Some one here correct me if I am wrong, but enhance views are not mobile correct? Or they are a mix of FB, Twitter and mobile?

You can run multiple viewers easily to gain credits fast. Just search it here and there are many methods to obtaining tons of credits for tons of free super long retention views.