The vast majority of Facebook users operate Facebook from their mobile device, and vertical and square format videos are more popular than landscape videos in mobile newsfeeds.
According to a 2018 study, 56.3% of top performing Facebook videos were either square or vertical, while only 39.9% were landscape.
A few basic formats:
• 9×16 – Facebook and Instagram Stories and Facebook (Full Portrait)
• 4×5 – Facebook, Instagram, and Twitter
• 2×3 – Facebook
• 1×1 – Facebook, Instagram, and Twitter (Square)
Grand Lake Web Designs (https://GrandLakeWebDesigns.com) has the experience and uses only professional video editing tools to re-purpose your videos from landscape to vertical.
A square format (1×1) aspect ratio is shown here.