sd memory card will show my recorded vids on my cell phone,but not my laptop.why?

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My laptop used to be able to detect the videos on my sd memory card i had on there,but not anymore.My laptop will detect pictures,songs,and contactees,but not my vids.why? It used to show them on my laptop,but not anymore.The vids will always show up on my cell phone,just not my laptop.I’ve tried everything which is why I’ve come to this forum for help.Anybody have any ideas or clues? Do i need to redownload software or a driver?  did i delete soemthing on my laptop I shouldn’t have?