I was recently asked about doing a possible discord server to chat on as well. I got one made for us and you can join it here: https://discord.gg/6yZkJfN6
(That link will last for one week or until July 2 roughly. If it expires just ask me for a new link.)
You can write to each other, talk with audio and I am pretty sure there is a way to share video even. I’ll add some of the discord bots for runescape to the chat and they can do various things too.
Please reach out if you have any questions. Remember this is an optional way to chat together.