Low quality channels have low quality comments. High quality channels have high quality comments. I feel a bit embarrassed for people who claim they've never

Low quality channels have low quality comments. High quality channels have high quality comments. I feel a bit embarrassed for people who claim they've never seen a good comment on youtube. Here are two examples I came across a few minutes ago: > Grady, to gain a variable flow control, could you use the horizontal angle of a folder weir? If the point of the folded weir was say 5 degrees higher than the outer sides, a slow flowing river would only flow over the lowest parts of the crest. As the flow increased, more of the weir's crest is used by the water, This would effectively self regulate the weir's geometry. response: > Such structures exist and they're called compound weirs. These structures come in various cross-section geometries which can be tailored to provide better control of water levels under various discharge rates. The structures discussed with a fixed crest height, also have a fixed relationship between the upstream water level and discharge capacity. I think that's an interesting exchange, don't you? Nobody is tossing around profanities, neither claimed the earth is flat, called the other a 12 year old, or anything like that. Insightful and constructive comments are common on decent channels, and non-existent on trash channels. That's not really a reflection of how youtube works, but probably a symtom of something more fundamental about human nature.