The following "sort" of gives information on what the bitrate, codec, etc. are best for Facebook.
Facebook Video Settings
Facebook can handle plenty of different video types, but these are the ideal settings according to Facebook’s help page.
Use the H.264 codec for Facebook video, and the AAC codec for the audio portion of your video. H.264 is a popular (and very good) video codec that yields high quality video for the file size. Most video converters can transcode to the H.264 codec, and the same goes for AAC for audio.
The ideal file formats are MOV or MP4. In other words, the resulting file name will look something like myvideo.mp4 or myvideo.mov.
The ideal Facebook video dimension is 720p (frame size of 1280px wide by 720px high). If you upload a video that’s higher resolution than that, Facebook will downsize the video. If you let Facebook resize the video frame, you might lose some quality in the process. My preference is to downsize the video locally on my computer before uploading the video to Facebook. That way I have more control.
The video frame rate must be 30 frames-per-second or less. I shoot a lot of video these days at 60 frames per second (a fairly recent development in my video life), but in order for Facebook to play the video back, it needs to be reduced to 30fps or less. I do this locally on my computer as well.
Audio requirements are: stereo audio with a sample rate of 44,100 Hz (commonly printed like 44.1 kHz). This is a common setting, but many video cameras capture at a 48 kHz sample rate, so you might need to do some conversion here as well.
The maximum duration of a Facebook video can be 25 minutes. But seriously…when was the last time someone watched a 25 minute long video on Facebook? That’s not a common thing. You probably want to keep your videos to 3 minutes or shorter. On the internet a 3 minute video can feel like forever, and this is especially true when you’re on Facebook scanning through your News Feed.
Those are the technical requirements. Pretty straight-forward stuff. Now, how do you ensure your Facebook video meets these requirements? You can use a variety of different video converters.
Personally, I always start with my master video file. I bring the master in to Apple’s Compressor, where I have a preset that I’ve tweaked a bit. I started with the built-in Facebook video preset that comes with Compressor, changed a few things, and saved it as a new preset.
Source:
http://www.izzyvideo.com/facebook-video/