Need help

As i have a youtube channel i am promoting it by fb whatsapp and commenting on others videos so i needed a help,that is there any app or bot automation tool anything by which whenever a video is upload by the creators whom i am subscribed to in youtube i can comment a random comment on the video instantly automatically for free :):):):):):):):):)
if there is already a tool than please inform me and if not:(:(:(:(:(:(:(