Not for the faint of heart: a public swimming pool in India

If you have been to India, you know that you can often see complete unsanitary conditions there. However, apparently, everyone is happy with everything there. Many people are not at all against even swimming in a public pool like this. I warn you - the video may cause nausea. Why people behave like this is a mystery to me. Perhaps you have some suggestions, share them in the comments.