Well I don't know much but I joined some Discord servers for programmers and English language learners' society and it's really helpful. We can exchange messages between group of people pretty quickly via mobile app. In the server we may create channels and if someone has a project needs others' help he may ask and the moderator can create a group for all of the members working. Inside a group chat we can exchange the data files and work messages. Well I'm not a technical expert, I don't know very mmuch,and my English is not very good either but I feel the Discord app is really handy. You can find a server to test at this site.
https://disboard.org/search
By the way if I have a movie with the video and the raw sub need to be fixed, how can I find someone to help on the site.