Hugh Fraser from Big Mouse Take 

A little bit of Hugh Fraser (confirmed by Howard Fein) animation from the last Loopy De Loop cartoon made from 1965
Fraser was a former Disney animator who, alongside the dozens of other Disney staff that got laid off following the hectic aftermath of Sleeping Beauty, went to work for Hanna-Barbera for a while. Though, He also worked for Jack Kinney on some of the 60’s popeye cartoons done by his studio during that time
Taken from the internet archive, credit to Looneytuneyjulio for that even being on there. Just a lil’ grasp of moreso fluid than usual animation from HB before their animation became even more limited than what it already was.