视频中展示了一双手正在操作一个相机的胶卷盒。开始时，双手拿着一个装有胶卷的黑色胶卷盒，盒子上有两个箭头指示方向和“120”的标识。接着，双手将胶卷盒打开，取出里面的胶卷。然后，双手拿起相机的机身部分，将胶卷盒安装到相机的底部。整个过程中，背景是浅色的桌面，光线柔和，突出了手部动作和相机部件的细节。
The video shows a person handling a roll of 120 film and a camera back. Initially, the person is seen holding the film roll, which has arrows indicating the direction for loading. The person then opens the camera back and carefully inserts the film roll into it. The camera back appears to be designed specifically for medium format film photography. The person ensures that the film is properly aligned and secured within the camera back.
A person holds a film cartridge labeled '120' and rotates it to show different sides. The person then presses a button on the bottom of the cartridge. The person opens the bottom compartment of a camera. The person carefully inserts the film cartridge into the camera's film compartment.