Can you guys help with my swing?

I have trouble with my driver, often slicing or the starting straight and then turning right mid flight. Here's one bad shot which sliced and one which was nice and straight

[Bad shot] (https://www.youtube.com/watch?v=eACBq8QZnx0)

Good shot

I'm not really sure what I was doing differently between the two shots. Any help would be appreciated. Thanks