Intan, you might have accidentally hidden the files or even the folder that your videos are in. you may have checked the following procedures out, but if you haven't I'll talk you through. 1. go into Samsung files on your device, tap on Internal storage. look at the top right & you should see 3 dots, click on that and look for settings. click on that and you should see more options listed, click on Show hidden system files. Swipe back to system files, you should now see more folders than before, but with lines on their icons, this is to show that they're hidden folders. you can ignore those unless the folder containing your videos looks like the new style hidden icons. DON'T ALTER THE THE SYSTEM FILES OR YOU MAY CORRUPT ANDROID & DAMAGE YOUR PHONE. look for the folder containing your videos, click on it & if the missing video files are there but have lines like the hidden system files do then rename them. when you do this you may see a dot . before the file names, just delete that dot . eg .Family video now renamed to Family video. But if the files aren't in the folder they should be then you have moved or deleted them. Also check to see if you moved them to your SD card. Now go back to the three dot more options setting and uncheck the Show hidden system files, and close samsung files. 2. Go to the Video app & you'll see at the top right the three dot more options menu. click on this and you will see the option to hide folders. click on this and you'll see options to hide folders. if you see the folder containing your videos has been hidden, then click on that to show the folder again. this will give you regain access to that folder & it's contents. 3. check to see you haven't moved the videos to your secure folder. if you have just remove from the secure folder to get normal access or keep them there and you can have access to them there. 4. if you still can't find them then you have accidentally deleted them, harder to fix but go to the Google play store and look for apps that find, and undelete deleted files (this method is similar to what law enforcement do to find files) & it may depend if you have rooted your device. plus this may or may not work, especially if the videos have been overwritten by Android. I Hope you're search is successful.
