"IMG_8138.mp4" is a automatically assigned by Apple iPhones and iPads to video recordings. Without the actual video file or more specific context, it is impossible to provide a review of the content. Why this filename is common:
: If this is a specific file you found online or in a shared folder, providing the source website or the creator's name would help. IMG_8138.mp4
: iOS devices name files in a "IMG_XXXX" format. This specific number just means it was the 8,138th media file saved on that particular device. "IMG_8138
: Is there a title or description associated with where you found the link? IMG_8138.mp4