when i upload videos from my camera to my computer, it only works with one of my cameras. I'm getting a new camera, and i don't want to buy it and find out that i can't upload videos to my computer. when they're uploaded, and i click on them to play them, it pops up, and it's just a black screen. the video doesn't play. on my mom's camera, it's a black screen with the sound of the video. my friend came over and we made all these videos, and when i uploaded them to my computer, it was just a black screen with no sound at all. how can i fix this?
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