[Feature request] Metadata viewing

[0n-s]

When mpv loads a file, it prints some common metadata to the terminal:

$ mpv Weapon\ Demonstration：\ Gunslinger [my6TfPgCKaU].mkv 
 (+) Video --vid=1 (*) (vp9 1920x1080 59.940fps)
     Video --vid=2 [P] 'cover.webp' (webp)
 (+) Audio --aid=1 --alang=eng (*) (opus 2ch 48000Hz)
File tags:
 Artist: OfficialTF2Wiki
 Comment: https://www.youtube.com/watch?v=my6TfPgCKaU
 Date: 20160706
 Description: A video demonstrating the Gunslinger.
https://wiki.teamfortress.com/wiki/Gunslinger

Damage
Base damage: 65 (100%)
Critical: 195
Mini-crit: 88
Damage repaired per hit: 105
Upgrade amount per hit: 25
Metal cost per repairing hit: 1 + damage / 3
Metal cost for reloading ammo: (1 / bullet), (2 / rocket salvo)

Function times
Attack interval: 0.8 s

This is part of an ongoing weapon demonstration project. 
Help us out! Learn more at: http://wiki.teamfortress.com/wiki/Team_Fortress_Wiki:Weapon_Demonstration
 Title: Weapon Demonstration: Gunslinger

I'm requesting some way in Celluloid itself to view common tags like these for the current video. Maybe in a standalone metadata panel, maybe in the playlist panel, perhaps somewhere else (up to your discretion).