We are having a real nightmare with panoramic video on android.
Apparently same android version (4.4.4) with nearly same chrome version (41.0.2272.94 vs 41.0.2272.96), plays well in some phones (soni xperia, for instance), but badly on others (on huawei ascend g7 the video plays but the poster image doesn't disappears, and the video can be heard but not seen). On other cases, the video plays well, but a horrible artifact can be seen vertically ( Samsung Gallaxy Nexus 4, Android 4.3, chrome 41.0.2272.96). On the Samsung Galaxy Tab s 10.5 (Android 4.4.2, chrome 41.0.2272.96), the chrome webGL can't be activated even when I set it so in the chrome flags settings, so the panoramic video plays as a normal video...
This behaviour has nothing to do with our files, it has been tested with the demo files provided here: https://krpano.com/video/.
Overall, among the 5 different devices tested, only 2 (Google Nexus 5 and Soni Xperia) play acceptably. Is this what should be expected?