You can either watch commercials or at minimum graphics during timeouts and long breaks in the action when national networks would've normally taken commercial breaks, or you can watch a bunch of random shots and video of what's going on inside the stadium, likely with no sound or just crowd noise, which is still a long break and isn't much more exciting.
Last year during the NBA playoffs we watched a particular streaming service. They didn't insert any commercials, but during breaks in play the announcers just went silent and viewers of the streaming platform just saw a raw feed of what was being displayed on the scoreboard inside the arena...The the dancing grannies at mid-court, some act doing dog tricks, the audience dancing to get their faces up on the video display in the venue, etc. Luckily we were watching a replay of the game so we simply jumped past all that.