TL;DR: The Australian Open is streaming games for free on YouTube. The catch is that the players, court, and ball are all 3D generated. They and constructed in near-real time using cameras and video tracking software.
The loophole allows the Australian Open to show a version of live events at the tournament on its own channels, despite having sold lucrative exclusive broadcast rights to partners across the globe.
Demonstration video: https://youtu.be/H-TCgvSeYj4
Around 15 years ago my brother and I worked on an RFID based limb and ball tracking prototype. The idea would be to allow instant replays of sporting events from any possible angle.
We never got funding to complete the project, and transmission interference was always tricky.