I assume you know what a corner is - the point where two edges meet. A rectangular sports court has 4 corners. In football (soccer) for example, the ball is sometimes returned to play from one of these corners. However, in the same sport where the aim is to get the ball into a goal, the netted area of the goal is also rectangular and you may hear people speak about the corners of the goal, eg "the ball went right into the corner".
"Right into" idiomatically means either as far as possible, or as accurately as possible, for example:
He went right under the table.
This would mean that the subject put his whole body under the table as opposed to just reaching under it with his arm.
He shot him right between the eyes.
This would mean that the shot was so accurate it was as good as equidistant between both eyes.
So without additional context, your question about "right into the corner" could mean either the ball goes very accurately into the corner, or as far into the corner as possible. This secondary meaning is more likely if talking about the corner of the goal, as a goal in soccer is scored merely by the ball crossing the goal line, but powerful kicks are celebrated in the game and it would be noteworthy if the ball went "right into the corner of the goal" as opposed to just rolling gently over the line.
"Bending the ball" does not mean that the ball physically bends. In soccer it refers to the trajectory of the ball, ie it is kicked in such a way that it travels in an arc.