Simon -
I am sorry that you had this close call, but I believe that you have interpreted the situation wrong and should rethink it.
From your video, it is clear that there is a "scissors" situation - vehicles approaching in both directions - at highway speeds on a shoulderless road. The white pickup passed you at 0:02 and the semi passed at 0:05 - so the semi driver had just over a second after he passed the pickup to respond to you. Not to mention that the pickup driver was way over to the right - - should have been a serious clue.
From earlier clips, it also appears that you are taking this video with a hand-held camera. Plus most of your posts have a long music playlist - so you may have an ipod going, too. I could not see a handlebar mirror on your bike or on the bike of the rider in front. Do you use a mirror?
Added to this, your group appears to cycle, at times, as a cluster strung out over a half mile or so. This makes overtaking even more difficult for vehicles.
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From some of your comments - such as the condition of the showers in parks - you seem not to understand the people or the communities through which you travel. In west Kansas, these communities are small, poor, often with an average age of more than 50 - - yet residents take the time and effort to make sure cyclists have accommodations - - using their weekends and funds to do so.
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In the U.S. there are signs which say "Share the Road" - meant to alert motorists to cyclists on the road. Still, this motto works both ways. Although this is a dream vacation for you, for the motorists you encounter along the way, it is yet another workday - often at very low pay and great distance in rural America.
Hopefully, that is something you can gain from this experience.