Fb in-stream video advertisements:

Really helpful dimension: 16:9 ratio beneficial. Add the highest-resolution video that meets file dimension and ratio limits. 

Really helpful specs: .MP4 or .MOV format, most file dimension 4GB, most size 15 seconds, most body fee 30fps

Suggestions: For in-stream advertisements, Fb recommends importing the “highest resolution source video available without letter or pillar boxing.” Fb gives an exhaustive list of side ratios and options out there for every advert kind.

Fb Messenger video advertisements:

Really helpful dimension: Add the highest-resolution video out there that meets file dimension and ratio limits.