How so?
Videotape Hi-Fi was still analog stereo, no?
(matrix) Dolby Surround encoded stereo movies - any stereo media (analog or digital) can contain Dolby Surround (stereo radio, stereo tape, stereo vinyl, stereo optical disc etc.).
Videotape Hi-Fi stereo has higher fidelity than videotape linear stereo (especially at the slower videotape speeds), videotape Hi-Fi has the same high fidelity sound quality at all videotape speeds.
Kirk Bayne