In this article you’ll see the complete overview for the Facebook Image Size Page Post Video and how to use to their best advantage.
When to Use: Promote your business by telling a story through a video.
Tip: Promote videos that show behind-the-scenes footage, product launches or customer stories to raise awareness about your brand.
Design Guidelines Facebook Image Size Page Post Video
Recommended thumbnail size: Your thumbnail image will show on your ad when the video is not playing. It should be at least 1200 x 675 pixels.
Video: 1,080 pixels
Ratio: 16:9 ratio
File size: 1GB maximum
Text: 90 characters