In the US your only defense for using someone else's copyrighted broadcast is fair use. Making clips of every play of every game is highly unlikely to be considered fair use.
Copying from one of my responses to the same concern:
"Highlights / clips are probably less of a concern, but definitely still a concern. Adam Silver has said "The way we look at it: we’re incredibly protective of our live game rights, but for the most part, highlights are marketing" https://www.sporttechie.com/adam-silver-against-suing-nba-hi...
We also think that NBA itself, ESPN, and BleacherReport can benefit from this technology. There are a lot of potential use cases we think that can be unlocked with this. Right now we're going the consumer route first where they can see live clips, but we can see ourselves potentially working with one of the bigger players if they see value in this.
Do you have any info about what it's called or how it's used? I'm surprised ESPN doesn't have a clickable video link for their play by play for example. NBA has it for league pass holders, but they also don't offer it in real time, which to me defeats the purpose. I want to see and share a video of something that just happened, not only forced by having to wait until after someone else covered it in a highlight.