*Is this what you are talking about?
https://www.youtube.com/watch?v=uat_L7iHvhI *
Ahhhh that, its actually not an addon for personal player name plate. Its a simple addon for healthbar, but
has been placed in center of screen as player is always in center. So it looks as though you have your own personal health bar. Also. The other frames are simply
xPerl addon or similar. Size has been increased to look like that ofc. Neat idea for arenas.
For personal health bar (as in the videos) you can use either a heavy addon like Xperl (complete set of raid frames, arena frames, target/focus/player/pet, frames) and adjust them to look like that. Else you can try something simpler like
Galvin's Unitbars
However if you have scripting knowledge, you can work with
OUF addon which is probably the GOD of all UI addons, but it doesn't have any user interface in game. You have to script and modify it to your own need or find a
ready made layout and use it as you own without modifications.