You should be fully aware of the different forces when it comes to video engagement on the different platforms.
YouTube - pays you for good, engaging content.
Facebook - no monetization.
This is not saying one is better than the other, it just means that the motivations for spreading your video are different.
Improving Engagement
Short form video is powerful but without knowing these basics you may be spending alot of resources without an ROI. It all comes down to whether you can hold someone's attention for 30 seconds.
- Generic openers are invisible "Wait for it..." gets skipped every time. But "100 squats daily made my knees click weird" stops the scroll. Specificity beats mystery.
- 5 Seconds - Most people bail between 4 and 7 seconds if you haven't proven its worth watching. Hit your viewers with your best visual or stat right at second 5. That's your real hook.
- Any pause over 1 second kills you - Anything longer than 1.2 seconds and people think the video froze. What feels like good pacing to you reads as "boring" to someone scrolling. Cut way tighter than feels natural.
- Pattern interrupts are everything If your video looks the same for more than 3 seconds, people zone out. I started switching camera angles, adding b roll, changing text placement, anything to create visual variety.
- Rewatch rate is more important than you think Videos people watch twice get pushed way harder. Started adding quick text that's easy to miss, faster cuts, little details you catch on second viewing.
- Measure video engagement second-by-second to get the nuances of when people drop off.
Engagement is the number one thing Facebook and YouTube use to determine whether or not to promote your video.
Second to Engagement
The below list is covered in more detail in: 
YouTube SEO Best Practices
- Video Descriptions
- Chapters
- End Screens
- Comments
References
Success in Your Social Media
About Social Marketing
YouTube SEO Best Practices
