As a best practice, here are CM's video specs. The below can and should be provided to account teams for the creative houses:
The maximum size allowed is 1 GB.
Always upload a source file with the highest possible specifications you have available so that Campaign Manager can transcode the asset into as many serving files as possible. We recommend you use a high-definition video that meets the following requirements:
File format: .mov or .mp4
Dimensions:
Landscape/horizontal: 1280 × 720, 1920 × 1080, or 1440 × 1080
Portrait/vertical: 720 × 1280, 1080 × 1920, or 1080 × 1440
Square: 720 × 720, 1080 × 1080, 1920 × 1920
Aspect ratio:
Landscape/horizontal: 16:9 or 4:3
Portrait/vertical: 9:16 or 3:4
Codec: H.264
Frame Rate: 23.98 or 29.97
Bitrate: At least 20 Mbps
Length: 15 or 30 seconds
File size: Up to 1GB (per the Campaign Manager file size limit)
Black bars: No black bars
Letterboxing: No letterboxing
Audio:
Codec: PCM (preferred) or AAC
Bitrate: At least 192 Kbps
Bit: 16 or 24 bit only
Sample rate: 48 kHz
Audio settings: Required
For videos serving on connected TV devices, we recommend 1920 × 1080 as the creative's dimensions.