It looks like some Xbox services are currently down across numerous devices. According to the Xbox service status page, both Xbox Video and Xbox Music stores are down for Xbox One, Xbox 360, and PC users. Additionally, Xbox Live is experiencing issues with matchmaking.
"Xbox members, are you having a tough time accessing music and video content? We are aware of the situation and working to resolve the issue ASAP. Thanks for being patient while we work! We'll provide an update as soon as we have more information."
"Are you having trouble matchmaking in Battlefield: Hardline, Battlefield 4, or FIFA 15? We're aware of the situation and working alongside our partner get things fixed ASAP. Thanks for being patient in the meantime, Xbox members! We'll provide an update as soon as we have more information."
It looks like the Music and Video outage has been ongoing for a couple of hours now, while the matchmaking issue for Xbox One users began a short while ago. If you've been having issues with any Xbox services, you can keep track of the situation at the Xbox support page.
Update: It looks like everything is in the clear. Happy streaming and gaming!
Source: Xbox Service Status
Thanks for the tips!