The video which will be used in your ad. TikTok has an intelligent optimisation tool to help you optimise any videos in order to meet the aspect ratio requirement.
File format: .mp4/.mov/.mpeg/.avi
Recommended aspect ratio: 9:16/1:1/16:9
Recommended resolution: ≥ 720 x 1280 pixels / ≥ 640 x 640 pixels / ≥ 1280 x 720 pixels
File size: ≤ 500MB
Recommended video duration: 5~60 second short video
Bitrate: ≥ 516kbps
TikTok recommends that the video has background audio, the video content is complete and user experience won’t be affected due to sudden interruptions to music or videos, and there should be no blurring or distorted pictures caused by stretching or compressing of the image. They also suggest that the video should be localised for local official languages.