Many of the so-called YouTube experts really don't know beans, and that certainly applies to some of the garbage I have seen regarding colloidal silver. Anybody can make a YouTube video the same as anybody can claim to be an expert, but neither one makes them automatically an expert.
True colloidal silver does make it past the stomach acid. I have seen a very large number of unsolicited testimonials and talked to many pet owners who have benefitted from colloidal silver. It is great for eliminating fatty tumors, preventing parvo, helping with hip dysplasia and arthritis and much, much more. What I was alluding to about putting it in your kitty's water is that most people who do so and have older pets report that their dogs and cats have renewed vigor and friskiness such as they have not seen in years.
To see some information by true colloidal and ionic silver experts, see: