This was the first of the several latter-day (mid 1960s) Tom And Jerry animated shorts I watched in the past month, having seen about 20-30 overall. Well, all I can say is: I am not impressed. I'll take the earlier stuff ('40s and '50s) any day.
These caricatures almost didn't even look like Tom and Jerry in spots. The artwork looked terrible. I would have guessed the opposite: that this was a primitive early edition, not something done late in the career of these animated favorites.
Story-wise, Jerry takes some strange green potion that makes him into a super-fast character, that goes around devouring all the food that Tom is ready to eat. It's done so fast, Tom doesn't have a clue what is happening. After he videotapes Jerry and puts it in slow- motion, he sees who the culprit is. When he goes to attack the mouse, Jerry has taken another potion which makes him a giant.
That's it - that's the story. Not funny at all and poorly drawn.