better if they can do live or non love telecast on t.v . i have seen once but it was a different moba . in that way the quality of the video is good because no loading or buffers are going to experience .
Check this:
https://lol.gamepedia.com/2020_Season_World_Championship#MediaMostly, games are streamed on Youtube and Twitch but you might want to check the other media on that list as it might have a cable channel supported by your provider. And in the current internet development, so unusual to see those buffering even using a data connection.