It is next to impossible to get it back, sadly...
Your only chance is to write an appeal to AdSense, through their appeal form. But beware however, if you have violated any terms of service or guidelines, admit it in your appeal. Google can easily tell whether or not you are lying.
So complete honesty is the key!
But if you did stuff like:
Click your own ads to generate revenue
Have your friends/family click your ads to generate revenue
Generated views through some botting service (sites like enhanceviews and addmefast)
Payed for traffic on a third party website
You can almost be sure that you will
not get your AdSense and monetization back.
Actually, looking through your videos, your "The Witcher 2: Barricade Rage - Part 2" seems to be botted pretty bad.
10,473 views and only 11 likes (and 0 dislikes). This seems to be a very unrealistic ratio.
So, whatever happened, just be honest, because Google will always know