I never said you didn't know how to use WP but I think you have expectations beyond your device's capabilities. Video and audio are resource hogs and you should have known better. Thus endeth the lesson.
Sent from my Lumia 920 using Tapatalk
no I don't think so. Audio and video is one of the things that doesn't need that much of memory or cpu/gpu power. As long as you don't take 4k or 1080p video you are good to go. The image is already rendered and has only got to be displayed. Audio is the same thing. As long as the device isn't rendering a lot of polygons or rendering really high res textures and bitmaps 512mb should be enough