Hay you sound pritty confused from that video. I know just how you feel. I started watching from about the middle of January it was a tough job to catch up with me to. All it took was a bit of time to browse through alot of the lg15pedia. Since i figured it all out iv introduced 3 or 4 friends to the show and they cought on just by linking them to these pages
This explains the official story from start to the latest episode
CassieisWatching was an arg that based all of its story around bree doing teh ceremony. when bree decided not to do it and run away the creators of CiW couldnt change there story and had no choice but to end the story.
Please dont confuse this with itscassie as this another fan fiction as it is yet to be proven to be made by the creators. This is another story which is kinda cool
Opaphid was another arg created by someone who isnt part the the lg15 creators. When it became popular the creators invited him into the team and they brought the stories together. A few months ago he did somethign wrong that i never found out about that got him fired and they wrote all the opaphid characters out of the show.
Opaphid was created by this guy
looks like canon and meep have been explained to you. and you know about maddy i think which was created by our no1 PM jeromy and not by the creators so thats about all i can do right now at being the good samaretan