Does anybody know where can I finde something simmilar to this effect, it’s a crop? an overlay? please help!!
It is adjustment layers with masks applied above the main footage with transform(Scale) effect and in some cases blur, tint and other colorization and distortion effects.
For example my project called Focus Distance uses this techniques. You can check it out and try to recreate these effects from scratch or purchase the project and see the techniques. But this just a suggestion, nothing more.
Hope this post will help you:)