I would add to your list and say that channels with already established, enthusiastic audiences, that can 'over-ratio' your upload with likes/comments/shares/playlist adds within the first 24 hours almost always have an advantage with ranking.
If you watch the engagement levels on new videos from popular channels you'll see engagement percentages of well over 20% which is off the charts. Typical engagement ratios are much much lower.
It all becomes a self-feeding mechanism as your channel gets more and more popular over time. Another good reason to focus building your audience around people that actually exist.