Getting Player Names

So I have been working on getting a my priority cool down to work sorta close to how DoJ has it. I would like to have it to whenever a priority is active, it will show the players name. I’m not very knowledgeable on how to get player names and such but would love some help. Along with that I was also looking into how I could make it so when the cool down runs out, it will say Inactive. So it would go from a cool down of like 1 min, run down, and then turn inactive and start counting up for how long it has been inactive. Below is a screenshot of kinda what I am looking for. Thank you!

https://gyazo.com/2fe0d1da8e7e82863f46ba912082c83a

I am using the priority cooldown here.