The video reveals what appears to be a pirate skin, which is good news for all-pirate teams. The recent update to the test server also included the Fiora files, which reveal her abilities:
(Passive) - Duelist: Fiora regenerates health over 6 seconds each time she deals damage. Striking champions will cause this effect to stack up to 4 times
(Q) - Lunge: Fiora dashes forward to strike her target, dealing physical damage. Fiora can perform the dash a second time within a couple seconds at no mana cost.
(W) - Ripost: (Passive) Fiora's Attack Damage is increased. (Active) Fiora parries the next basic attack from a champion or monster and reflects magic damage back to the attacker.
(E) - Burst of Speed: Fiora gains Attack Speed for a couple seconds. Each basic attack or Lunge she lands during this time increases her Movement Speed, stacking.
(R) - Blade Waltz: Fiora dashes around the battlefield striking random champions dealing physical damage. Successive strikes against the same target deal less damage.
This doesn't look like the new support champion we've all been waiting (and voting) for, but from her abilities she's sounding pretty worth the IP.
Champion abilities source: Sk-gaming.com