It looks like HTC is taking queues and learning from the example of Samsung's teaser videos. HTC just launched two of their own for their new HTC One M9 flagship. The first one above shows off the gorgeous design characteristics of the phone as it floats ominously through space.
The second video (in the thread below) tugs at the heart-strings by showing us our connections. It's narrated by Robert Downey Jr., which shows they still had him under contract despite those awful videos they produced previously. This second one is actually quite brilliant! Enjoy!