-they filmed
The word filmasen is the imperfect subjunctive form of filmar in the third person plural.
See the full filmar conjugation


Según una persona que conoce bien el tema, sería de gran ayuda que los medios de comunicación búlgaros filmasen las prácticas corruptas que se producen en la frontera.
According to one person in the know, it would certainly help if the Bulgarian media were to film the corrupt practices that go on at the border.
Want to Learn Spanish?
Spanish learning for everyone. For free.
SpanishDict Premium
Have you tried it yet? Here's what's included:
Cheat sheets
No ads
Learn offline on iOS
Fun phrasebooks
Learn Spanish faster
Support SpanishDict