Let's Crack Zodiac - Episode 2 - Bigrams (RE-UPLOAD)

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UPDATED: Oct 21, 2021: YouTube broke the original upload due to a rights issue with one of the songs in the video, so I uploaded this fixed version.

This episode came out about 7 months before we made the discovery of the Z340 solution. So it is interesting to watch this episode in hindsight, especially the importance of the bigram clues, and the consideration of transposition schemes which turned out to be a fruitful line of investigation.
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Welcome to "Let's Crack Zodiac".
True crime meets classical cryptography.

Episode 2: Bigrams

Is Zodiac's unsolved cipher a hoax, or does it have a real message?
Let's investigate some possible clues!

Credits:
Music: Ibrahim, "encounter with a mech patrol unit" https://soundcloud.com/ibr
Music: Albertvvl, "Chariots of Fire" https://www.youtube.com/watch?v=QRq6psRHQIQ
Graphing library: Plotly https://plotly.com/
Question mark animation: Greenlit Studio https://www.youtube.com/watch?v=EIA0lEuoBdc
Babbage narration: Jon Adams https://www.fiverr.com/jon_the_voice

Forum posts about "period 19" reading method that produces more repeating bigrams:
http://www.zodiackillersite.com/viewtopic.php?p=39003#p39003
http://www.zodiackillersite.com/viewtopic.php?p=38542&sid=c94f602c513bea38e12605b93b03c883#p38542

Видео Let's Crack Zodiac - Episode 2 - Bigrams (RE-UPLOAD) канала David Oranchak