This is bit Transformer history about the vintage Japanese version of Transformers called the Diaclone line that Hasbro adapted naming it Transformers as we know it today.

There's a short video about Grimlock in AOE. (I think that's already posted)

Website:

https://www.yahoo.com/movies/before-they-were-transformers-meet-the-early-japanese-89777222787.html