One of the authors of a blog I read likes to say (playing on the
quote from Dobzhansky) "Nothing in modern conservatism makes sense, except in light of creationism". The obvious point being that once you become familiar with the tactics and mindset of creationists, you can oftentimes apply that to dealing with conservatives in general.
With creationists and their dishonest quote mines, even after they've been exposed as dishonestly edited and taken out of context, creationists still use them and cite them as supporting their position.
It's the same thing here with these videos. Now that they've been exposed as dishonestly edited and taken out of context, conservatives will still use them and will keep citing them as supporting their position.
And that brings up yet another interesting thing about conservatives. Psychological studies on the differences between self-described conservatives and liberals have shown that where liberals value objectivity and accuracy more, conservatives value loyalty and sanctity more. That helps explain the above (both with creationist quote mines and these videos). For conservatives, the most important thing with the videos isn't whether or not they're objective or accurate, rather the most important thing is that they support what they believe is a righteous cause and came from a member of their team.
That's why I keep posting "Your tribalism is showing" to conservatives here.