@kiran The rudder alignment is perfect 90 degrees,
@sanja rai sir, sundaram sir - using  expo  60% and cg is slightly nose heavy, the recommended prop is 5inch. this is a5x5 prop. yes there is 2degree down and right thrust. even tried reducing the throw to 50% in the last video still the same.

I still think its tail heavy its not dipping nose when wings are level rather its climbing.

Only when banked its dipping nose which is but normal.

Also, check axial CG. As I said before - lower the CG too. Try temporarily fitting the battery to the outside of the model on the fuse bottom. A high CG will make it unstable in roll

I ll try adding weight below the nose part.

here are some suggestions

mix in a bit of up elevator with rudder
put some washout in the wings