Yup, watched it.
For a trailer, it needs a bit more work I think.
It could be shorter. 90 seconds is plenty for a trailer. If there's more that you need/want to show, consider making a second, slightly different, trailer.
It wasn't all that clear what was happening, after the part with the doctor. "Kid has sick mother, needs money for medical treatment, his friends are all going to help raise it". I got that part fine. Then it dissolves into many different fight scenes and someone waving a gun about. That's a most unusual method of money-raising. Are they robbing banks? Mugging tourists? Fighting each other? There is a need to know.
Most of the subtitles look fine, btw... although I did get a chuckle out of "They will define words.". I was imagining the group of friends all getting jobs at Meriam-Webster.
(Well, I shouldn't laugh I guess. Your English is better than my Russian
How are you going to be showing the finished flick, Mr Timur?