I noted that the first video recommends saltpeter or baking soda, turmeric powder, lemon juice and mineral water (I learnt from some articles and commenters that discourage sugar, hence I didn't mention sugar here). I also noted that this medicine is an ancient Indian remedy, and it is recommended for one to take the medicine for two days and then make the medicine again to take for 10 days.
I learnt from the second video that other than drinking enough water daily, it may help to drink water with lemon juice and/or apple cider vinegar. I googled and found this article that shares a similar view on the effectiveness of apple cider vinegar, as well as baking soda, in working in tandem to prevent and/or remove any kidney stones.
"Preventing kidney stones is sometimes as simple as drinking your ACV tonic each day. A simple tonic can be prepared by mixing a couple of tablespoons of ACV in a cup of water. You can add honey to make it taste better.
If you're interested in using apple cider vinegar kidney stones remedy,it is important that you don't use it without diluting it. Usually, the recommended rate of ACV and water is 1:10. "
(Source: "Apple Cider Vinegar for kidney stones")