Download this 'no intro' mod.
Unpack the contents of the archive to <path-to-game>\archive_win64\
In the menu, select 5 to extract the original intro movie (this is required).
Next select 1 to remove the intro movies.
Launch the game.
To restore the intros run the batch file and select 3, or replace game2.arc with the backup that was created in step 4.
This is the no intro mod archive obtained from the Mega mirror and provided by https://steamcommunity.com/sharedfiles/filedetails/?id=1626668925.
This mirror is provided as the original Google Drive mirror seems to not be accessible any longer.