Nothing dark about VHS. It's not dark age of technology, unless previous stage was more advanced, and that stage was an actual drop of tech. Actually, considering audio and video tape as dark tech - is rather weird, and shows either desire to show off something newer generations didn't have or inability to understand the pathway of progress.
Dark age was from 5th to 10th centuries. Also from 15th to 25th millennium in Warhammer 40K.
Oh, and also, my family had one of those.