Decent reasonable people Congratulate others when they have achieved a milestone in their life - I would hope you received congrats during your graduation from elementary, Junior High/Middle School, High School, and possibly college/university (unless you havent yet).
Non-Greek here but have a family full of AKA’s and Delta’s. I have to say as their graduate advisor you did an outstanding job. This was well performed. I’ve seen so many videos lately that have my cousins, sister and elders shaking their heads. Y’all kept it cute and classy.