Doubt in kadanes algo

#1

in the given video he is finding this and intially our ms=0, and cs is also 0 ???

max(cs,ms) so in this part ms will always be zero

like max(cs,0) which means cs will always be bigger,

which is not correct, i did not see in the video where he update ms value before finding the max(cs,ms) will you please explain it to me with the help of code

#2

Hey when we do max(ms,cs) then its result is saved in ms
i.e
ms=max(ms,cs) here its getting updated.