If your creative requires videos, you need to keep in mind the following pointers:
MP4 format using the H.264 codec.
As a precaution, Bonzai recommends the maximum video file size of 2 megabytes (MB) to comply with the various publisher specs. Please check with your publisher for more information on the optimal video file size.
6 - 30 seconds duration
4:3 or 16:9 aspect ratio