The channel is a container of videolessons. Osteocom ask you to pass in your body request the channel id field retrieved from the catalog so that osteocom can keep track for which product was purchased by your customer. Each channel has its own language and its informations are set in that specific language, likewise the videos contained in it.
You have to consider the channel such as a container of a set of videolessons. The video is a content as a part of the channel that depends on it. When your customer buy the channel, he is authorized to access the entire set of videos belonging to that channel.
There is a difference between the product and the channel?
The product and the channel are the same thinks. When osteocom asks about product, it goes to mean always the channel.
Does Osteocom store sensitive purchase data, such as credit card information?