the fortress:dynamite
 

Can somebody help me by telling where to find the second dynamite to blow upp that wall

Second dynamite is in the room which is very near to the place where you started the level. Compass arrow will guide you.

If you still can`t find it, let me know, will post video or screens.

and where to find first.Compass arrow will guide you? i don`t see
how to look in compas

after you blow it up with the first stick, rub back to near where you met the guy in the cell who shoots himself when you give him the pistol. In that courtyard you will see that a door that was previously closed is now open, go in you will find loads of dynamite.