Ranking on YouTube Search is affected by a combination of several factors including:
1. Video Popularity (number of views per hour)
2. Audience retention (time watched, average view duration)
3. Channel Authority (channel age, total channel views, subscriber count, average channel retention, no. of videos, partnership status, good standing)
4. Search Relevance (title, tags optimization)
5. User Engagement (likes, comments, social shares, favorites added, subscriptions driven)
NB: Videos uploaded from channels with good channel authority or through the
unlisted method may be instantly ranked on page 1 for about 24 hours.