I have a free image/video host called picmecca.com. This project is about tweaking the appearance of picmecca video/image posts on Google+ and Facebook to make the image as big as possible, while keeping the quality, and not showing embedded links (to avoid being flagged as spam by moderators or Google+´s or Facebook´s system).
The image width and height must be able to fit on Google+ pages or Facebook pages (not be bigger than available space to avoid messing the layout).
Note:The video/image needs to play or open in [login to view URL] because the idea is to drive traffic.
Check the sample image called [login to view URL] to see the exact reason why the video/image posts are being rejected.
Knowledge about meta data templates for Google+ and Facebook is basic. Check here: [login to view URL]