Update docs/configuring-playbook-jitsi.md

Co-authored-by: Slavi Pantaleev <slavi@devture.com>

docs/configuring-playbook-jitsi.md

@@ -129,7 +129,7 @@ You may want to **limit the maximum video resolution**, to save up resources on
 
 ## (Optional) Additional JVBs
 
-By default a single JVB is deployed on the same hosts as the matrix server. To the scale the JVBs and allow more conferences you may wish to provision additional JVB services on other hosts.
+By default a single JVB ([Jitsi VideoBridge](https://github.com/jitsi/jitsi-videobridge)) is deployed on the same host as the Matrix server. To allow more video-conferences to happen at the same time, you may need to provision additional JVB services on other hosts.
 
 There is a ansible role that can be run with the following tag:
 ` ansible-playbook -i inventory/hosts --limit jitsi_jvb_servers setup.yml --tags=common,setup-additional-jitsi-jvb `