Vietnamese Videos and piracy

I found a set of Vietnamese videos teaching the alphabet in cute songs. There are 2 videos covering A to R, and there should be one more for the remainder of the alphabet. I emailed the makers of the video set to ask about the last video. Their response was that there was so much copying of their videos that they were busy suing the stores and didn't have time or money to invest in new productions. Apparently the stores were copying and selling the videos in bulk. There were some things I didn't like about the videos in that they were not exclusively in Vietnamese, but they would throw English translations of the songs in some segments. Not only that, their English translations were not the best translations. I would rather teach one language well, than have two mixed up languages. But the amount of learning video is very limited, I haven't even seen any made in Vietnam. I guess it's not as common for kids to learn from videos as it is here in the US.