[HELP] Avisynth script in Hybrid

[Selur]

Is that correct ? is there an other way to do it ?

Yup, that won't work.
a. you need to explicitly load the plugins (Hybrid uses a standalone Avisynth++ versions)
b. you might have to add 'return last' at the end since Hybrid does not add it automatically and otherwise your script does not return anything.

Cu Selur