These warning screens are from Prism Entertainment.
This is the warning screen, which is the same as the Warner Home Video Warning Screen from 1981-1987 and has also been used for Parents Approved Video, Embassy/Nelson Entertainment, GoodTimes Entertainment and RKO Home Video.
As seen on VHS, such as Dominique is Dead (aka Dominique) (1978/1979), and others
This is the warning screen, which is the same as the Warner Home Video Warning Screen from 1981-1987 and has also been used for Program Hunters. The blue background were used, the word "WARNING" is in grey and the graininess were used.
As seen on VHS, such as Honor Thy Father (1973), Wolf Lake (1980), The Mutator (1989), Tales From the Crypt (1972), Marvel Comic Animated Series of the 1980s, including The Incredible Hulk, Georgia, Georgia (1972) and others.
This is the warning screen as the same as Paramount Home Entertainment warning screen from 1989-1995.
As seen on VHS releases, such as We Are The Children (1987) and False Identity (1990) among others.
This is the warning screen has the boldest italic (probably Lucida Sans Unicode) in all caps on the dark gray marble background, especially the word "WARNING" in red color on top center and those white details are in the left alignment.
As seen on VHS, such as Strangers (1992), Strange Horizons (1993), A Million to Juan (1994) and Sleepstalker (1995) and others.