Edit: anon SuperTrooper4U found the right one. (The following was my guess, but listen to Bosi in the video anyway).
Bosi says right in the above post video (@5:10-5:18) that "it's the letter-"
I agree both images seem to have the mug image blurred, but it looks as if it may be the US Marine Corps (four-star?) General flag, complete with the gold border. With something in the center.
Can anyone verify that those pictured are all Marines?
I found the picture he mentioned but cant make out the image on the mugs: https://www.thetimes.co.uk/imageserver/image/methode%2Fsundaytimes%2Fprod%2Fweb%2Fbin%2Fad87eaac-79fd-11e7-ac37-79a4ec05ba4a.jpg?crop=2143%2C1205%2C63%2C33
Here is a close-up: https://3.bp.blogspot.com/-IL6aMNURn8k/WgcWedXyGTI/AAAAAAABPaE/8t77U0rPCCk3t6bDdG1RPfF3VfjPwhohwCLcBGAs/s1600/rzabk4X-1.jpg
Edit: anon SuperTrooper4U found the right one. (The following was my guess, but listen to Bosi in the video anyway).
Bosi says right in the above post video (@5:10-5:18) that "it's the letter-"
I agree both images seem to have the mug image blurred, but it looks as if it may be the US Marine Corps (four-star?) General flag, complete with the gold border. With something in the center.
Can anyone verify that those pictured are all Marines?
https://www.flagandbanner.com/products/kamcstar446gg.asp?site=google_base&msclkid=d1dda853a1ab12dd548ecd19d8a08854&utm_source=bing&utm_medium=cpc&utm_campaign=*PMax%3A%20Flagpole%20%26%20Flagpole%20Kits%20%7C%20Smart%20Shopping%20-%20JF&utm_term=2325879410092611&utm_content=Flagpole%20Kits%20PMax
All their uniforms say it above their left breast pocket
Duh (head slap emoji). I was looking at the non-close-up photo.
Thanks, anon.