Yes, watching time is often a better indicator compared to number of views. Try to change one variable at a time so that you can determine which is really having an impact.U should try testing different hooks, video lengths, and posting times. Also, check ur insights to see which videos get the most watch time and engagement.
Of course, having more posts won’t make any difference unless they are in sync with what people want to see. I would first update the pages that have stopped getting clicks before writing new ones.I think it’s because your content has lost its appeal. don’t focus on quantity at the expense of quality.