How to save emailed video into Photos program? I'm just now getting used to Photos. When someone emails me a video, I can't just drag it into my photos library like I could with iPhoto. How do I add it to my existing library?
Save Attachment


Right click the video in Mail.
Select "Save Attachment".
Go to where you saved it in Finder. 
Drag it into Photos.


It may take it a while, depending on the age of your Mac, how big the video is, etc.