You may already have noticed the word “Optimize” in the most popular video remuxing tools: Subler, iFlicks etc. In this article, I elaborate on when you will want to use it.
Some apps like the above-mentioned iFlicks doesn't let you disable it. Neither does the current beta of another highly recommended remuxer, MP4Tools. The, currently, probably most recommended remuxer, Subler, however, forces you to manually optimize if you want.