This is a short movie of a candle being weighed on a precision balance. It is a boring movie, and badly made too. But as Winston Churchill once said:
If a thing is worth doing, it is worth doing badly.
There is one other such movie on You Tube, but well-made though it is – the director clearly used a tripod – I prefer mine.
In fact it is obvious that a candle must be losing weight, and you can make measurements on a much less sensitive scale for a longer time and get a good estimate of the rate at which the cancel is losing weight. But somehow, it is still shocking to see it happen ‘live’.