Io credo che lo Script che hai trovato sia quello FrSky, comunque come spiega Torban Dallas nei commenti al video e anche
https://fjp.at/projects/fpv/taranis:
The mentioned lua script to switch the internal module into the FCC or EU-LBT mode can be obtained from the FrSky support. Because it is not allowed to share this script, just write a mail to the FrSky support (frsky@frsky-rc.com) asking for the lua script. It is named isrm_mode_1.lua. Using this script you must choose the correct firmware that is allowed in your area.
Ciao