Sharing a video from Photos, Yosemite I filmed a video on my iPhone 5, the synced my phone with my computer, and the video was put into my photo library. I want to share this video on Facebook, but whenever I click on share >> Facebook, Photos says 'exporting files to be shared' and after about 25 minutes or so (the video is 2.6gb, its a 22 minute video) Photos finishes 'exporting' and then doesn't do anything. I don't get an alert telling me anything at all.
Facebook has a limit of 1 Gig or 20 minutes Video.

Also RECOMMEND uploading video files in .MP4 format.

So you definitely need to cut back.