100% identical BTCUSD/ETHUSD charts. How is this possible?

Updated
Sorry for the lag in the video, my computer really sucks.

I waited a long time to publish this, not knowing if it was a good idea. Now, I think I may have waited too long, because we don't have the data for the minute charts anymore from when this event happened. Luckily, I took screenshots.

When South Korea announced that they might ban cryptocurrency trading, there was a huge crash. From that moment, the BTCUSD and ETHUSD charts perfectly synchronized. And I mean -perfectly-. Every single candle from ETHUSD, down to the minute, could be superimposed onto BTCUSD. They weren't just similar, correlated graphs anymore, they were one and the same.

This lasted for a few days at least. In the updates below, I posted the screenshots I took at the time and superimposed them to show how it went from two different graphs to two identical graphs.

Anyone have a hypothesis as to how this can happen, other than through some highly coordinated effort by some massive players?

At the moment, the graphs are nearly identical but not exactly. My bet is that the two graphs will once again become identical once the mysterious "they" decides it's time to dramatically bring it back up again. I don't want to sound like a conspiracy nut, but other than a controlled event, I don't see how such a perfect synchronization of the two graphs could have taken place.
Note
Here is the image of the overlapping graphs...

image.ibb.co/cjte9c/BTCETHUSDTSIDEBYSIDEMOMENT.jpg
Bitcoin (Cryptocurrency)BTCUSDChart PatternsEthereum (Cryptocurrency)ETHUSD

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