How is bit rate defined in relation to video?

Bit rate is defined as the amount of data recorded per second in a video file. It is a crucial aspect of video quality because it directly affects the level of detail and clarity in the video playback. A higher bit rate generally indicates that more data is being processed each second, which can lead to higher quality video with better resolution and less compression artifacts, as there is more information available to capture subtle variations in color and detail.

In contrast, resolution refers to the dimensions of the video image (such as 1080p or 4K), which is not the same as bit rate. The length of the video clip pertains to its duration, which does not influence how much data is encapsulated per second. Finally, the type of lens used for recording is related to the physical capture of the image rather than the data rate at which it is processed or stored. Thus, understanding bit rate is essential when evaluating video quality, as it ties directly into how much information is contained within each second of video playback.