Here I'm posting the video with my stream (left side) compared with the betting site (polish local site, but it could be any other bookie that you want).
https://streamable.com/huh58f The fee for access to my stream is 600€ and you pay only once and you have it until tournament ends. So probably not that soon.
Explain to me how this is going to give you the advantage over the streaming that are done on the betting site? Also, why a person sitting at the match, cannot just stream the video from his phone? (If you can beat the betting site with a couple of seconds, then it would be worth the value of the ticket to have a person sitting there and video calling you)

I know some of these tournaments does not allow spectators at some of these venues at the moment, but that will soon change. I would also bribe an "employee" at the venue to stream for me, if it was really worth it.

Please give more details.