In this part you'll see the main excercise for your right hand in order to master sweep picking.
So let's get on the right hand movement - the trick for the right hand is to move the pick across all of the strings in one direction.
So when going from 5th to 1st string - it's DOWNSTROKE across all of the strings. Also a slight angling will help you not to get stuck in between the strings.
Same works for going from 1st to 5th string - but in this case it's UPSTROKE also followed by a slight angling (see video).
/Pavel