Looks like I should take my words back. The appearance of the fish in the video, where it is covered with large plates in the fashion of scales including below the lateral line, looks like the norm for the large adults (which for some reason looks like a human disease where skin flakes off and grosses me out). So I take back the "weird" comment. And the snout may be only a bit shorter. It appears smashed because of the overall puffiness of the fish, it's just bursting with mass, including the snout (!), probably just fat reserves and not swelling / water retention. I don't think this is bloat, or not all of it at least, because of how evenly puffed up the fish is everywhere on the body, including the mentioned snout fat deposits. The whole thing looks unhealthy indeed but the pic of the wild one, the last one from KRich shows a very fat specimen too. The fat hoarding could be a seasonal thing, as with many other animals living in the feast and famine conditions season-wise. The eyes look ill.
The litho in the video is affected by the tank mates, likely like that piraiba that swam under it. The fins bear evidence of old and fresh trauma.
Variation of the base colors within the drab realm (blackish, greyish, yellowish, brownish, dirty-whitish, bronzish, etc.) is known to not mean much beyond the effect of the environment and sometimes geographic variation, which again is probably due to the said environment; whether these variation became hard wired and made it into the fish DNA is a separate and hard topic. This is if we are talking about permanent colors and not transient, mood-related colors, like breeding, defending, getting caught, etc.