Live-streaming from your smartphone is about to get even easier. Comcast is following the lead of live-streaming apps such as Periscope and Meerkat and adding a live-streaming feature to its X1 set-top-boxes. Comcast is introducing Xfinity Share, a new way for people to send live video feeds to from their smartphones to their own TV's or TV's of friends and family members. You'll just need the home phone number tied to their Comcast account to add friends to your contact list. Users will also be able to stream recorded video from their smartphone's camera roll.