Review: HTC One X for AT&T
With respect to music, the One X has the Google Music app, and MOG Music. Sadly, the FM radio found on the international version is missing. The Google Play Store is on board if you want to purchase tracks directly from the handset, and of course you can download Amazon MP3, Slacker, Pandora, or other streaming music app from the Google Play Store.
On the video front, the One X includes the stock YouTube app, HTC Watch, and a simple video player. HTC Watch is HTC's movie rental store. You can also download video content from the Google Play Store. The selection between HTC Watch and Google Play is about the same, as are the prices. The One X also has AT&T's Live TV app, which streams video content to the device. It's ok, but content is constrained to bit-size portions.
Music and video both sounded and looked good on the One X. I was pleased with the quality of music, in particular.