Facebook expands live video, challenging TV and web rivals

Facebook Inc  on Wednesday expanded its live video product, Facebook Live, giving the feature prominent placement on its app and rolling out features to make it easier for users to search and comment in real time.
The move is the biggest challenge yet by Facebook to online rivals, including Twitter Inc’s Periscope live-streaming service, Snapchat’s video features and Alphabet Inc’s YouTube, as well as a potential threat to broadcast television.
Live video is becoming a hig