Bottom Bracket Replacement

Hey all,

I think I need to replace the bottom bracket on my Smart S. When peddling there is lots of play when pushing down on pedals. The pedals seem to move out. The crank arms have movement other than the turning motion in which they should move.

I have never had to do anything with the bottom bracket,

Is it something that needs adjusting or replacing?

Any links to videos or instructions is greatly appreciated.