please add more instructions in description

searched on youtube and learnt to install ffmpeg and added to system environmental path. in the import video window added video link, subtitles links, selected deck, pressed go! i did not get any error message, it processed and showed in how much time. then nothing happens. so removed the import video window to see if anything is shown in the deck, but i see nothing. please help. what should i do to generate cards. i did not get to set time limits. i feel there should be more description for this addon, it is just not clear to me.