Recommended plugins for my needs

hey guys,

So im currently redesigning my website and decided to go with wordpress for the first time. I am running phpBB3 along side it using the forum bridge so users share the same login.

There are a few feature i need to run on my site for a better experience. I was planning on using buddypress, that way i can give certain users permission to do certain things?

im after feedback on what plugins are out there that are close to my needs, i have searched on themeforest too

-Downloads-
Simple system with features to have main/ sub categories, can select which users can add/ delete files.

-Gallery-
Has main categories/ sub categories, with image covers. Can select which users can upload/ delete pictures

-Video-
Has main categories/ sub categories, with image covers. Able to add videos straight from youtube and certain members can upload there own videos, choose from which members can create/ delete videos.

-Live Streams-
Allows me to add/ display the feeds to members Twitch account.

-Events-
Monthly calendar, allows certain members to add an event. Allows certain members to apply and say if they are attending the event, this will display current attending members.
Event details should include something similar too;Title displayed on calendar, Main tile, Information, Start/ finish, time/date, Link to forum post, Server, Game, count down timer

thanks for your time and any input