do you actually save any money by not flushing.?

If you have to pay for water, then using less water will probably mean a smaller water bill. Depends how it's billed and how much you normally use. You probably won't save a lot, but some.

Yes, indeed, leaving the bathwater to cool before draining the tub can help heat the house. I used to do that.

Neither of them is going to save you a lot of money, but if you're short of money, or if you're not exactly short of money but want to minimize what you spend on necessities so there's more for luxuries or more to put in a savings account, the small savings can start adding up.

toilets use about 1.6 gal to flush  5 x 1.6 = 8 gallons.  x 30 days-240 gallons.  The highest water price I've seen is $2.00 per 1000 gallons.  (in a tiny town paying off a treatment plant and paying to bury water lines).  But, for sport say water cost $4.00 per 1000 gal.  240 gal saved is less that 1/4 of 1000, so He's saving $1.00 if his water is expensive.  Stinky house all month to save $1????  Not a bargain. 

Letting warm bathwater give up heat before draining it?  Would cut his house heat cost a (VERY) little.   A  BTU, is an energy unit. It is approximately the energy needed to heat one pound of water by 1 degree Fahrenheit.  My head hurts now....  But he ain't saving much $ with that

you can save money without flushing but the room would stink ..

It will save SOME water, but he probably paid more to post the video than he saves that way.

Of course not flushing helps. Of course thats gonna vary depending on the age of the toilet lot of new toilets use lot less water.  But it still adds up. 

As far as heat from shower I understand his theory but theres not enough btu's to effect much.  You'd save more by cutting shower water off while lathering up then back on to wash off.

The flushing thing is correct. The less you flush, the less water you use. That's just a simple equation. BUT--the water from showering or bathing isn't heating up anything. (especially if it cools down first!)  It goes into the waste pipe--which is likely tucked away in a corner of the house that has nothing to do with the home's heating system. The home isn't going to be warmer for this practice.

If you really want to save water in bathing, turn it OFF after you get wet initially, then lather up with your soap, THEN turn it back on and rinse off. And keep your showers SHORT. A BATH takes about 10X the water that a shower does. 

Many people don't flush liquids every single time--and that actually DOES save you a significant amount of money; but with  most low-flow toilets these days, you're saving water anyway. 

There are many OTHER ways to save water and pay less on your water bills. Efficient plumbing is your best bet. Not letting your water 'run' from the tap is another. Turning off your outdoor faucets in the winter is another. Watching your own usage and minimizing it is another. 

And remember, "cheap" doesn't always mean "sensible."

unless he has a severe shortage of heat or water -- a few pennies over the course of a year

After thinking about these two things,I decided that they are rather ingenious and of enough benefit that I am going to use them myself.Why not? It makes no sense to pour money down the drain,especially the heated water in the bath tub concept.

If it saved any money the amount would be negligible.  It wouldn't be worth it at all.  Tell your friend he can save money by peeing outside, or if that isn't possible where he lives, he should pee in the bathtub and then use just a little bit of water to rinse it down.  In any case, pity the person who actually visits his disgusting house.

I suppose doing all sorts of strange things would add up to a certain amount of money over time; however, our largest expenditures are usually not things like water or electricity.

To make a real impact, cut things like credit card debt accruing massive interest (about 80% of monthly payments go to nothing more than interest).Or that one five dollar coffee drink each morning (22 workdays monthly = $110 a month)I doubt a flush or two extra would add up to that much.

There’s nothing wrong with being frugal and wise, as long as there’s some actual math to back up any claims of money savings.