Unfavorable Semicircle: The Mystery YouTube Channel With 72,000 Videos

April 5th, 2015, a YouTube channel appeared with a nonsense name, Unfavorable Semicircle.

That first day, that channel uploaded one thousand two hundred and forty-seven videos within twenty-four hours.

The first was titled The Sagittarius Symbol, followed by nine eight zero seven zero eight.

It was four seconds long, a brown background, no sound.

Then another video appeared, and another, and another.

The channel uploaded a video every few minutes, then every few seconds.

Within nine months, it posted over seventy-two thousand videos.

No human could do that. The Internet noticed.

They thought it was a bot or a glitch. Then they started combining the videos.

Thousands of frames assembled into composites.

An image appeared. A man in what looked like a suit, but he had no face.

His face wasn't blurred. It wasn't there, like someone had erased it from reality.

To understand how strange Unfavorable Semicircle was, you need to understand the scale.

YouTube's upload system has limits: verification, processing, compression.

Each video takes time. Now, a dedicated creator might upload one video per day. Ugh.

A prolific channel might manage ten or more per week.

Unfavorable Semicircle started at one video every ten minutes around the clock.

Then it accelerated. By February 5th, 2016, the rate hit three videos per minute.

No breaks, no pauses for months. YouTube's infrastructure in 2015 wasn't built for this.

They limited creators to ten to fifteen uploads a day unless you had a special agreement.

Even verified channels with dedicated upload pipelines couldn't sustain more than fifty videos a day.

So three per minute? That required direct server access, back-end permissions that shouldn't exist.

And the content made no sense. Each video was different, but they followed patterns: abstract shapes, flickering colors, bursts of static.

Some were four seconds long, some lasted hours.

The longest ran eleven hours. Some were completely silent.

Others contained high-pitched screeching that made your ears hurt.

The visuals looked like test patterns from a television station: pixels arranged in grids, geometric shapes that pulsed and shifted, colors that flashed so rapidly they triggered headaches.

Some viewers reported nausea, disorientation.

One Reddit user said he watched for three hours and lost track of time.

When he checked the clock, six hours had passed.

Another reported ringing in his ears that lasted for days.

And the titles were equally strange. Numbers, mostly.

One eight six zero zero nine eight four seven.

But sometimes symbols appeared. The Sagittarius symbol, followed by the word Delog.

Sagittarius, brother. Sagittarius, brill.

The Sagittarius symbol showed up constantly.

And it wasn't typed. It was hand-drawn, each one slightly different, like someone sketched it frame by frame thousands of times.

That kind of repetition meant this was intentional.

The channel flew under the radar for months.

Then in November 2015, someone on Reddit posted, "Found something weird."

The thread had three responses. By December, it had two hundred.

People built databases, wrote scripts to download and analyze every video.

They used spectrograms to visualize audio, custom Python scripts to extract frames.

One user built a database tracking every upload timestamp, looking for patterns in the intervals.

By December, the investigation had its own subreddit with detailed documentation of every discovery.

Reddit user Jackalackadingdong, that was his handle, he spent months on the audio files.

I felt really uneasy listening to this, trying to pick out the sequence.

The whole thing is quite unsettling. They treated it like a puzzle, a message hidden in the noise.

One composite showed the man with no face.

Another showed space imagery: satellites, celestial objects.

And buried in the audio was a voice reading coordinates, latitude and longitude, pointing to a spot somewhere in the middle of the Atlantic Ocean.