From what I've seen, it understandably varies, as there are many ways to express the same thing.
For instance, if there is no commentary whatsoever, you might see: or similarly (without voice, e.g. < or perhaps more ambiguously or similarly (without 'reporting live', e.g. <
But, if there is no voice commentary, but some text-based commentary, you might see: or similarly (without voice, with text captions e.g. <
There may well be other iterations I've not put, so I would also wait back on other answers!