The terms format and resolution do not mean the same.
Resolution is the number of pixels that fit the monitor horizontally and vertically. As a rule, the more pixels, the higher is the quality of the image.
Some common resolutions are:
- 640 x 480 pixels (SD)
- 1280 x 720 pixels (HD)
- 1920 x 1080 pixels (FHD)
- 2560 x 1440 pixels (QHD)
- 2048 x 1080 pixels (2K)
- 3840 x 2160 pixels (UHD)
- 4096 x 2160 pixels (4K)
- 5120 x 2880 pixels (5K)
- 7680 x 4320 pixels (8K UHD)
A file format is related to how the file is encoded and decoded. Depending on the format, you may need to use different programs to play audio and video files or open photos/images.
Some common popular video formats are:
Sometimes a format may also be called an extension. However, it is not exactly the same: this term refers to the letters after the dot in the file's name, like .doc, .txt, .mov, and so on.