Movie ID extract from a docu-fiction clip

[rikids]

Dear All
 i am trying to find a title of a movie, from a documentary clip so what i have is the youtube link (which i cannot post so if you can youtubeit yourself...i am afraid is the only way) of this documentary titled El Gran Rio, and at which time its showed the clip.
56:22
It start with a crowd of people, jumping, dancing in what seems to be a farmers riot situation. 3 extras have red jacket, some dark but the majority is white dressed. There are several cut of this movie starting at 56:22 as mention above.
Since is part of a audio visual expo in Spain, and the directors are Spanish, i guess it could be a Spanish movie. probably late '60s or '70s. Also from the crowd costumes i would assume is a Spain history related movie.
If anyone can help me fund this title..i will invite him for a pizza !!!
thank you y'all
riki
PS (btw the documentary is pretty interesting)

[Archivist]

I don't know where that clip is from, but it looks hilarious. It almost seems like a musical number set in a historic period. It's like a Spanish Monty Python scene.