A lot is said about a "chip in the ball", but there is no current location technology that would be accurate to the sub-centimetre resolution that would be required. A camera-based system is the only potential solution, as used for the goal line.
The mock-up from Bein sports is a total joke, there is no way they could have generated anything remotely accurate enough from normal TV cameras situated dozens of metres away, at odd angles and heights. I guess they started with the image they *wanted* to show, then worked backwards from there, and claimed it was all "very technical so don't worry your pretty little heads about it". Total wankers.