Android 6.0.1 Mysterious "Videos" Taking Up Space

I have been made confused by the Storage Info of my phone since it shows 3.16 GB of videos took up my internal space. But then I checked, the videos not even passed 250 MB in total size. Can't seem to find the solution in the Internet yet, I've been searching tho. I am using Venus phone by Vestel (a Turkey's made) Preview: **Update 1**: The result I got after using Disk Usage app: **Update 2**: The result I got after using SD Maid app: " class="img-fluid rounded" style="max-width: 100%; height: auto; margin: 10px 0;" loading="lazy"> **Update 3**: The result I got after using Termux app with first given command: " class="img-fluid rounded" style="max-width: 100%; height: auto; margin: 10px 0;" loading="lazy"> **Update 4**: The result I got after using Termux app with second given command: " class="img-fluid rounded" style="max-width: 100%; height: auto; margin: 10px 0;" loading="lazy"> **Update 5**: The result I got after using 'dumpsys' command on my PC connected to my phone by means of USB Debugging: **Update 6**: after redo commands of 1st and 2nd but with adding 'grep' **Update 7**: result of commands 'dumpsys -l' and 'dumpsys diskstats'