`Subscription Value` is the mechanism used to achieve one-liner subscriptions. It works by having the subscription `"Subscription Name": "value"`, and assigning `"value"` to an override variable via setting the subscription value to that override variable's name.
This feature allows you to set subscription value within the config. In the near future, ytdl-sub will strive to make subscription files simpler by hiding most of the "under-the-hood" logic within the config file.
