TikToker VonViddy has taken his own life ... and his final video to fans is haunting, all about the ups and downs of his life -- talking about how he hopes to be remembered.

Von, whose real name is Joe Muchlinski, died Monday after "losing his long battle to mental illness" ... according to his sister, Martha.

In his final video, posted Sunday, Joe talks about the type of guy he wants to be remembered as, citing his music and comedy as a couple of strong points in his life. He also highlights some of his struggles -- saying he doesn't want folks to remember him "as an addict and an alcoholic who put his family through hell."

He ends his final TikTok by saying how thankful he is for the opportunities he's had over the years ... noting he has an abundance of peace and love for his fans.

Folks in both Joe and Martha's comment sections are sharing their grief for the loss of Joe after Martha's sad news -- one wrote, "Von Viddy we love you. Thank you for all of the laughs. Truly heartbreaking 💔."

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