I have seen the video. He has the wood mounted with the grain parallel to
the lathe axis as in normal spindle turning. Are you end grain hollowing
your bowls?

No, I have them mounted normally. Go back and take a look at the
video. The top of the lid is curved, not unlike the bottom of the
small bowls I am turning so, with each rotation of the blank, he is
presented twice with an endgrain situation.