So to deal with him, you'll have to change the rules to add in disrupting meetings to the rules, and add either removal of the person from being allowed at the next meeting, or fines to be levied.
The problem is, to change the rules you'll have to have a meeting, which he could disrupt.
What I'd recommend is a script, you have printed, that says exactly who needs to say what lines to be said to introduce those new rules. Distribute them to the other members before the monthly meeting, and discuss the plan of action, which is that you will film the meeting, and you will just read from the script to introduce these new rules (person A entertains motion for X, person B seconds, persons C-J vote "aye"). You start a normal meeting, recording it, and if necessary, bust out the script.
Read it, ignoring his antics. Everyone ignores him, reads the new rules in, votes on them, and gets it passed, on camera.
Now you have ways to deal with him that you don't currently.
Good luck! Will be interested to hear what solution you decide on, and how it works out.