It would be nice to have the translation of the joke before going on and on about possible explanations.
post
Here is the joke for anyone wondering:
https://en.wikipedia.org/wiki/Bar_joke#First_recorded_example
A dog entered into a tavern and said, 'I cannot see anything. I shall open this'
Tl;dr of the video:
spoiler
the bar is so lame that the dog plans to open his own bar
replies:
A man with both eyes squeezed shut walks into a bar. He cracks one open.
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