Translation:The player is throwing the ball into the basket.
When I search for "throws the ball into the net" it gives me result from football (soccer, if you prefer), not basketball...
And as 'bin' is concerned, well, that's still a correct interpretation of "do kosza", although it's surprising if it's "the player" ;)
In basketball, in English, we usually say "shoot the ball". "Throw" would be understood with a connotation of carelessness or imprecision.