Michael,
If it's your custom component, the easiest thing would be to enable the Open Graph - Custom plugin. Then, create a new object in the "Open Graph" area of JFBConnect. Set the Type field to "video" and check the "Built-In Facebook Object" box.
Then, in the right hand side for Query Params, enter the non-SEF params for your custom component pages that should be videos, like:
option=com_mycustomcomp
view=video
That will make any video view pages have the proper tag. You can get more specific by adding more parameters, or assign type="video" to all option=com_mycustomcomp URLs by removing that view=video line.
I hope that makes sense. Once that's setup, you could create Open Graph Actions to automatically post a "I watched video xyz" in a user's Timeline as well.
Thanks,
Alex