Another winner from Vestron, issued in 1982. This was marketed as a softcore title, but it opens with a disclaimer that was common on workout videos of the time, and onscreen they appear to be giving some instructions but there's no 'live' sound included here, so maybe this started out as a workout video then they realized only dirty old men would be watching this? The 'large' girl is Kitten Natavidad, who appeared in Russ Meyer movies and played the title role(s) in the classic porno movie "Bodacious Ta-Tas". The director is Ed Hansen, who did a few sexploitation movies in the 80s and 90s, including "Takin' it Off" and its sequel "Takin' it All Off" which also starred Kitten.
Sadly I only included the first couple segments since the clothes come off gradually with each one til they're completely naked at the end, and I'm still not sure of what YouTube allows in that regard. There's a couple other clips of this online that show more, but the quality isn't as good as my clip. This was taken from a CED videodisc, which seems to be the easiest format to find this on.
Half of what makes this great is the production library music used- I've heard many of these tunes used in commercials in the 80s. *UPDATE looks like the music has been ID'd as the Network Music Ensemble, and you can listen to ALL of these tracks plus other familiar ones on Spotify!