Q: Can I use Mirroring on my iMac to show a DVD on 2 Apple TVs at the same time?

Now that AirPlay mirroring from the iMac to the Apple TV has been enabled I want to know if I can use it to play a DVD on my iMac and have it displayed in two rooms of my house using 2 Apple TVs.  So far everything works fine with one that I can tell, but I want to make sure it will work with two before buying a second ATV. Thanks