Content Delivery Network (CDN): A network of distributed servers that deliver content to users more efficiently based on their geographic location, reducing latency and improving performance.

Video Codec: A software or hardware-based algorithm that compresses and decompresses digital video streams. It's used to reduce the size of video files for storage or transmission.

Adaptive Bitrate Streaming (ABR): A technique used in streaming media where multiple versions of a video are encoded at different bitrates. The streaming client selects the appropriate version based on the available bandwidth and device capabilities, providing a smoother playback experience.

Content ID: YouTube's digital fingerprinting system that identifies copyrighted content uploaded by users. It allows copyright owners to manage and monetize their content on YouTube.

YouTube Data API: An application programming interface provided by YouTube for developers to access YouTube's features and data, such as uploading videos, retrieving analytics, managing playlists, and interacting with the YouTube platform programmatically.

Video Analytics: Tools and techniques for analyzing video performance, including metrics such as views, watch time, audience retention, engagement, and demographic insights.

Recommendation Algorithm: The algorithm used by YouTube to suggest videos to users based on their viewing history, preferences, and other factors. It aims to enhance user engagement and retention by offering personalized recommendations.

Live Streaming: The process of broadcasting video content in real-time over the internet, allowing viewers to watch events as they happen.

Monetization: The process of earning revenue from YouTube content through various channels such as advertisements, channel memberships, Super Chat, merchandise shelf, and YouTube Premium subscriptions.

YouTube Studio: YouTube's dashboard for creators, providing tools for managing channels, uploading videos, analyzing performance, interacting with the audience, and monetizing content.

Content Management System (CMS): A software application or platform used by YouTube creators to upload, manage, organize, and distribute their video content on the YouTube platform.

YouTube Partner Program (YPP): The program that allows YouTube creators to monetize their content through advertisements, channel memberships, merchandise shelf, and other features, once they meet the eligibility criteria.

Metadata: Information about a video, such as title, description, tags, category, and thumbnail, which helps users discover and understand the content. It also includes video-specific data like duration, resolution, and upload date.

Copyright Infringement: Unauthorized use of copyrighted material without the permission of the copyright owner, which violates YouTube's policies and may lead to content removal, copyright strikes, or legal action.

Community Guidelines: YouTube's rules and policies that govern what content is allowed on the platform, including prohibited content, harmful or abusive behavior, and community standards. Violations may result in content removal, channel termination, or other penalties.