A new, mysterious video has surfaced online that appears to show the LG Nexus 5X running Windows 10 Mobile.There's not much to go on by way of where and how, but it clearly seems to be a legitimate case of Microsoft's mobile OS running on an Android phone.

This isn't the first time this has been a thing, of course. In 2015, Microsoft partnered with Chinese phone maker, Xiaomi, to officially offer a port of Windows 10 Mobile for its Mi4. In this case the Microsoft ROM completely replaced all traces of the previous, Android based OS, and left you with what is a fully functional Windows phone.

There's nothing to suggest this is anything more than someone who's very clever hacking it on to a phone. Not least that this is one of Google's Nexus phones, and there's almost no chance of any official partnership happening to make this something for regular people to do.

But here we go. Check out the video above and let us know what you think of it in the comments below!