1080p Video Plays On Facebook As 720p

[Martin Gardiner]

Does anyone know why my 1080p mp4 video only plays back on Facebook with a max. resolution of 720p? I see some videos people upload as 1080p, but mine are all 720p on FB? I export at H.264/mp4 – match source/high bitrate. When I Google it I see other people saying the same thing, but I haven’t come across an answer yet. Thanks!