might be an issue with the ubercharge hud element?

As an eu player, this makes me a lot more interested to watch some of the less big matches in invite as there are up and coming teams.

Valve should really add a console command for customisable voice latency (input & output). Idk if the issue is clientside or serverside, but you could just as easily make it a cvar anyway.

From the video it sounds like it's initially going to be 9v9 without class limits with them phasing in other gamemodes as time goes on.

I actually broke down crying when I read this.
I should probably see a therapist.

Whitelists also?

What modes will be available?

Oh god what is happening I'm actually extremely hyped.

This can work but one advantage I've found with modmic is that the magnet they come with sticks way better than velcro strips to my headphones.
I've used what marty linked as well, lower quality but clips to cable so stays on relatively well and won't have trouble picking your voice up.

https://www.youtube.com/watch?v=shCYA2J-De8

Where can I purchase a lansky body pillow?

https://www.youtube.com/watch?v=X-mPGJekly4

anyone got video of this?

Sometimes it's better to aim stickies by literally shooting areas and not people.
Watching demo reviews is great, looking over your own demos is really good.
Practicing pipes can be important but doing exclusively that on soap dm can make you worse at stickies (which are a lot more important) so I wouldn't recommend it all the time.
Termo's i52 povs give you a good idea of how to play and position yourself on demo but also are a good indicator of a good way to aim on demo (although it's not the only one) as his dm is really really good.
Practicing with a team is important as demo is hugely influenced by how people play around him and being consistently with the same players lets you adapt a good playstyle.
Think about ammo conservation, when to use each of your weapons, what targets you should be focusing, when to call focus etc. Try and mainly focus forwards at the chokes and don't focus on enemy players behind you when there's other players to deal with it and people to damage in front, you're the no 1 class who shouldn't get distracted. Think about whether you should be taking ubers or if your med can solo your pocket and you can stay out. Also think about how many heals/how much spam you want to be taking.
Remember, demo is a hard class and one that can't do much in dm situations a lot of the time so don't get frustrated when you get buttfucked by out of position players when you're reloading sometimes.

I addressed some of this in the etf2l thread, but I only ever feel it becomes a real problem when it impinges on your real life in some way. Anonymity helps and doesn't help in this regard. If you're anonymous it's pretty hard for that to become a real problem, if someone shittalks you on tftv or in tf2 where you're using some dumb alias then there's rarely an issue, if you're harassed by someone anonymously and you're not then it makes the issue harder to deal with if you need to.
90% of cases that I've heard of where it's become a serious issue are people harassed on social media by people they know where neither are aliasing though. Serious harassment from an anonymous person often turns into stalking cases which is often considered a separate issue.