Obtaining injector data

The information in the above video. I can not find on my well known injector manufacturer website. So I reached out to a forum and they told me I need to calculate KRKTE from the information I have. I’m first attempting to know what this acronym means and how it is calculated or relevant ?

It is your injector constant in ME7 (and others)

You can find lots of info on that on Nefmoto.com, for example.

It is relevant if you replace the stock injectors with different ones of different flow rate.

In addition to that, you need to change the injector dead times as well as per the numbers your injector manufacturer gives (or does not give) you.