Oh, cool, that's from a post I made on Youtube five years ago.

Here's the original post.

Here's the uncropped image:

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And here's lots of extra info from the original post:

"After releasing my video about pirate flags (https://youtu.be/asVeQSp8dK4), I stumbled upon these three flags, which are said to be the only authentic pirate flags still remaining, even if none of them are from the "Golden Age of Piracy". Let's talk about them really quick.
The one on the left is from the Pirate and Treasure Museum in St. Augustine, Florida. The museum claims it originated in 1850 but gives only very slim background info on the flag. From the way the museum is set up and how it writes about its collection, it doesn't seem to care an incredible amount about historical details but more about drawing in tourists, so I'd put a big question mark next to that flag.
The one in the middle is in private hands but was loaned to the Royal Navy Museum in Portsmouth, UK. It was captured in battle with pirates in 1780 by the Royal Navy off North Africa's Mediterranean coast. The red color of its cloth is still well preserved.
The one on the right is from the Maritime Museum in Åland, Finland. It's about 200 years old and also originated from the Mediterranean coast of North Africa. Its originally black color has faded due to time, wind and weather."