The AGMD forum has a nice bit of traffic compared to other completely vacant forums like the GD Doujin Projects one for example. Threads get buried pretty fast, especially if you make vidya threads during an ongoing season of Animu. So why not split?
If you think the traffic is too little one could always make space for Movies and TV Shows that are currently in GD GD in the vidya board, though that is not that necessary in my opinion.