I decided I would chime in and add a few things that are relevant to the live stream.
For those who don't know me, I'm the host of the weekly live stream show, Tetris Arena Live with Parkzer. It's become quite a hit lately, touting at least a couple thousand replay views per episode (which I think is decent for something that I started so recently).
I normally stream and cast with my buddy Maks - you guys may know him better as Ukrainian4Life. Of course, he does have other responsibilities and commitments, and is not able to make it to every stream; in these scenarios, I have allowed other people to guest commentate with me. I also have a few people who are wanting to do this when the spot becomes open. Unfortunately, excluding a select handful of veteran casters and commentators, I have decided not to have guest casters anymore.
Blink is taking a more polite approach when posting these etiquette guidelines, but I have a straightforward and direct personality. In non-sugar-coated terms, we want to make sure we can trust you. In cocky terms, we want you to prove yourself worthy before letting you participate in something that thousands of people will see and associate directly with Hard Drop.
Of course, when Tetris Tournament Online II comes around, there will be many opportunities for everyone to try out commentating, no matter what their style or skill level. If you would like to be recognized during this time, there are clearly many ways you can practice and improve, but I will leave one word of advice / guideline:
Behave yourself in a manner to which you want your audience to parallel.
In simpler terms, portray yourself with emotions that you want your audience to also feel. Humans have this intriguing tendency of synchronization and empathy - when we see someone feel a certain way, we tend to mirror it onto ourselves. This doesn't mean you necessarily have to act happy or excited the entire time. Obviously, everyone has their own, unique style of commentating. Just make sure your unique style isn't that of a hater, someone unhumorously and excessively critical, or overall just someone negative.
For example, if you're a shoutcaster like me, you commentate in an extremely excited, fast-paced, high-action manner. The audience watching will start to feel your emotions, also become excited about the game, and feel as if the things that are going on are of high intensity. They feel good because their brain is being stimulated by many different things in a short period of time.
If you're a calmer and more analytical commentator, you commentate in a more intelligent manner. The audience will start to feel your emotions, also feel as if they have an insight of what is happening in the game, feel smarter, and feel better about themselves when it comes to various aspects of the game.
That's all for now. Again, apologies to the people who were hoping to cast with me in the future.