Flag Flying Rules

I noticed a U.S. flag in the Nashville area flying at full staff yesterday. I thought to myself, they're supposed to be at half staff for a full 30 days after a president passes. George HW Bush died on November 30th, so why isn't that flag at half staff? As I continued my drive to work I looked for flags and while most were at half staff, a couple weren't. There are specific rules when it comes to the flag, so if you're not familiar I suggested reviewing the video below. Respect our country, respect our flag.