Now this is a leak that will put all previous leaks about the Samsung Galaxy S3 to shame. An actual video of the Galaxy S3 has hit the scene, by Vietnamese site Tinhte, who got their hands on a GT-I9300 which is supposedly the Galaxy S3 that will soon be revealed at Samsung’s London event, Samsung Mobile Unpacked, on May 3.

The GT-I9300’s specifications mention an HD 4.6-inch display at 720 x 1184 resolution (the remaining vertical 96 pixels taken by on the virtual on-screen buttons), a quad-core 1.4 GHz processor coupled with 1 GB of RAM, an 8 megapixel camera, 16 GB of internal storage plus a micro SD slot for expanded storage. To take care of the power requirements, the phone is powered by a 2,050 mAh battery, with NFC capabilities built-in like the Galaxy Nexus. In order to keep the actual design a secret, the device is encased in some sort of plastic rim, which is how the Galaxy S3 has appeared in previously leaked images.

This video is perhaps the strongest proof yet that what we’re seeing is indeed the Galaxy S3 (or whatever Samsung decides to call their next Galaxy flagship). The guys over at Engadget contacted Samsung for a comment on the matter, and got a reply saying, “We will be able to tell you more at the 2012 Samsung Mobile Unpacked.”, which neither confirms or dismisses anything.

So, check out the video of the GT-I9300 aka the Samsung Galaxy S3 below, and drop a comment and let us know what you think about it.