YouTube Channel ID

A YouTube channel ID is a unique identifier assigned by YouTube to every channel on the platform. It is a combination of letters and numbers that is used to identify a channel and its associated content. The channel ID is different from the channel name or username, which can be changed by the channel owner.

The channel ID can be found in the channel's URL. For example, in the URL "https://www.youtube.com/channel/UC-lGfdserm254_Vd_AJ5Yw", the channel ID is "UC-lGfdserm254_Vd_AJ5Yw".

The channel ID is used in various parts of the YouTube API, such as for retrieving channel information, videos, and comments. It's also useful for tracking the performance of a channel over time, and for identifying channels for analytics or advertising purposes.

It's worth mentioning that, YouTube also provide a way to link a channel with a custom URL which is a unique name that you can use to create a custom web address for your channel. The custom URL is based on the channel name and can be changed if the channel name is changed.