VKontakte
Click Add channel and select Vkontakte.

If the account is not connected yet, click Add account. Sign in to VK in the window that opens, using an account with access to the required community, and confirm the requested permissions.

In the available channel list, click Add next to the required community or personal page. If the community is missing, check the selected account and your platform permissions. The Cabinet screenshots show a demo account and community.

If VK asks for community access, check the selected community and click Allow. This platform screenshot comes from an earlier version; its appearance may differ.

After the connection is confirmed, find the channel in the list. Click its name to open its settings.

Turn on the channel switch. Adding a channel alone does not start a broadcast: an incoming stream is also required.

Then start your source and check the broadcast. Repeat the connection process for each required community. See VK broadcast parameters.