Ronald McDonald and the Adventure Machine (found McDonald's animated video; 1987)
From The Lost Media Wiki
Around 1987, McDonald’s released an 8 minute VHS called “Ronald’s Adventure Machine”, which was only available for viewing at birthday parties at the titular restaurant. The video was animated by Sinnott and Associates in Chicago.
Plot
Not much is known about it, but from what I can say, it involved Ronald and his friends going inside this Adventure Machine created by The Professor, and yeah.
Gallery
References
Facebook posts regarding of animation cels/the VHS itself: https://m.facebook.com/FilmingInMcDonaldland/photos/a.1642088052523145.1073741938.385488298183133/1833380306727251/?type=3