The platform is Youtube. please answer more detail as much as possible

what does the platform do?

Platform sides: Identify and describe the sides (positive, negative side, same sided, and cross sided) , or types of users, of the platform, and why these different sides, or types of users, are connected to the platform

Network Effects : How does the platform leverage and/or mitigate any or all of the four types of networks effects?

Core Interaction : What is the core interaction (participants, value unit, filter) on this platform?

Value proposition : What is the value proposition of the platform?