This sounds like the title of a popular style of YouTube video where a creator shares their early-stage journey, often to encourage new creators and be transparent about the reality of starting on the platform.

While the specific video you're asking about might be from a smaller, individual creator, the key message of that title is a well-known piece of advice for aspiring YouTubers:

The Core Message: Post for Practice, Not for Views
A video titled "Keep Posting on YouTube Even if Nobody Watches: My First 28 Days!" is typically meant to convey the following lessons:

Views are Low at the Start: In the first 28 days (or even first few months), it is normal and expected to have very low views. The YouTube algorithm needs time to understand your content and your audience.

Focus on Consistency and Improvement: The goal of the early stage is not to go viral, but to:

Practice the technical skills (editing, lighting, audio).

Build the habit of consistent posting.

Find your voice and niche.

The "No One is Watching" Freedom: The time when nobody is watching is the best time to experiment, make mistakes, and learn without the pressure of a large audience.

The Long Game: YouTube is a marathon, not a sprint. The content you post in your first 28 days forms the foundation of your channel and, over time, can accumulate views as the algorithm starts to push your more recent, higher-quality videos.

Many popular channels now create these "journey" videos to show their audience that everyone starts with zero views and that the initial struggle is a necessary part of growth.