There´s one or two already recognisable during the lanceless / Caparisonless cavalry Charge (Battle of Loudoun Hill ?*) at...1min 38 secs
Beauchamp (Gules, a fesse between six cross crosslets or) to the far right mounted on the black nag.
Albret, far left (Gules)
Percy (Or, a lion rampant azure) 1min 34 - Middle of screen
Wether any of them were there at the battle...if it´s Loudoun Hill ..??
*Aymer de Valence´s Standard is missing?
EDIT;- It is 98% likely Loudoun hill. The actor Sam Spruell can be seen at 2.08 riding along the line and he is acting as Aymer de Valence in the film
oh...and it appears the film of him inspecting the line..is in mirror Image...swords, shields, Lances (where there are any) Held in the "wrong Hands" and the Lion rampant on Sam Spruell´s surcoat back to front