The lesson
Open a post with a one-sentence thesis about how your buyers decide, then let a stage clip with captions back it up.
The post opens "In B2B marketing, the fundamental unit of purchase decision-making is the Buyer Group." The vertical video shows a speaker in front of a slide reading "Buyer Groups will pay more for products that their colleagues already know", with a bar chart and a burned-in caption. It shows 18,272 reactions and 406 comments.
Don't borrow the Buyer Group claim or its chart without your own source. Keep the pairing of a crisp one-line thesis with a short, captioned clip of the evidence.