Those sound like scenes from Messy Fun's "Splatgirl" VHS tape. No longer available as physical media, but can be bought from Vidown, links given by other posters below.
Edit: Had forgotten you can still buy Messy Fun vid clips from Vidown.
Classic vids. Don't know why it isn't linked, but you can find the missing Splatgirl Vol 2 if you click the "mudwoman" tag. Watching Amanda try and snorkel her way through the claypit was definitely a high point, IIRC.
Love you, too
