When dealing with data, we refer to cache as a method of storing data in order to speed up its use at a later point in time. Throughout the distribution chain, we can store the data of a video at several points, in order to access it more quickly in the future.
When we talk about cache, we should keep in mind that the same term can be used as a verb (“we will cache the data”), or as a noun (“we will use the data cache in the next step of the process”).
In the world of content distribution networks (CDNs), we should know that they cache video data within the edge servers closest to the user. On the other side, web browsers use the video data requests to get the following demands to be extracted directly from the browser memory, speeding up the process.