Strange! you are an Indian and asking such questions, May be this will help
did you watch the video you posted all the way? at the end it says the villagers said the guys who planted the Pak flag said "don't say anything against immigrants from Bangladesh". Try again.
now to the first part - how does a ULFA/M training camp explain how the Pak Army can be driven out of a town in Pakistan that they captured from the taleban? The ULFA/M clearly debunks any point you are trying to make in your own video.