Chameleons aren't as solitary as you guys think. You can read in the litterature that Furcifer Pardalis can be seen in a small groups.
In fact, Chamaeleo dilepsis, Chamaeleo chamaeleon, namaquensis, Chamaeleo (Trioceros) cristatus, montium are really lonely chameleons, but others aren't necessary.
These species; Furcifer pardalis (R. Tremper, pers.com), lateralis (W. Schmidt, 1985), Chamaeleo (Trioceros) affinis (Necas, 1995), bitaeniatus (Bustard, 1996), Hoehnelii (Hebrard 1983, Hebrard & Madsen 1984, Toxopeus et al 1988), Chamaeleo calyptratus (Necas, 1990, 1991, 1995), Bradypodion thamobates (Langerwerf 1992, Raw 1976), have been cited to live in dense colonies, up to one chameleon per square meter. Also, some of them, like Chamaeleo (Trioceros) Hoehnelii (Hebrard 1983, Hebrard et Madsen 1984, Toxepeus et al 1988) can form permanent couples.
In France, where i belong to a group of very skilled people, some of them have very but very large enclosures containing many chameleons, sometimes up to 10 or 12. Some of them live in a lonely way, some of them are in small groups, usually of 2 or 3. I have seen beautiful pictures of chameleons sleeping together, like one inch next to each other, when they had the opportunity to be alone by moving to another spot.
Note that these enclosures are usually one room big, easily 10feet X 12 feet (if not much more), densely planted, with the top up to the roof!
Now, all i wanted to point out is the misconception of the solitary chameleon, because they aren't all that lonely. However, in this video, they don't have an enclosure big enough for 6 chameleons and lacks several things... So yes, this guy is wrong.