Are streams in general delayed to prevent live-spyingyour opponement?

Hi, I'm a stream-viewer noob. Been watching T90's Hidden Cup2 tournament on Youtube and in general a lot of aoe2 vids on youtube lately.

Sometimes the commentors will have just mentioned "a villager", "a tower being build", or what kind of unit would be good to buils right now, oe in generally what would be good to do - and a splitsecond later you see the player dp exactly that/send 1 unit to the end of the map to catch that villager just mentioned.

I recall at least one incident in footage of a aoe2 commentator streaming a random aoe2 live-noob match on twitch and halfway through the stream you could see the newbies react more and more to what the streamer had just mentioned a few seconds ago. That case I assume viewers just started to add the players on steam and spammed them with what the comment guy was talking about, like "woah a castle would be so good now", or "man he really needs some pikemen to counter..." And viewers would probably just spam the btw foreign bad english newbies with things like: "BUILD PIKEMAN!!!", and boom - they are spamming pikes all of a sudden. Btw we are talking real aoe2 newbies here, and you could basically figure out the more consistent and often the streamer mentioned what would be a streategy right now - the faster the newbs switched there strategy to that.

For pro players it's ofc a different deal, wouldn't be as easy to spot if they are watching the stream while in match - or not - and personally I don't feel pro's would cheat like that.

But the concidences I noticed in the stream footage lately have been just so much - I wonder: is stream spying in tournaments even possible? Not trying to discuss if it's likely - that someone is doing that.

Before I just wanna ask if it's possible in theory in pro tournament's like T90's Hidden Cup - or if he's just commenting on recorded footage from hours ago while live streaming?

Sorry if my question might be dumb, just a thought in my mind while enjoying aoe2 vids on Youtube :)