I love the weekly iteration videos, the quality is amazing and I learn a lot.
There should probably be a category “The Weekly Iteration”
A much more powerful tool than cdpath is fasd. There is a oh-my-zsh plugin for it https://github.com/robbyrussell/oh-my-zsh/blob/master/plugins/fasd/fasd.plugin.zsh and prezto also has one. Lets say I have a directory.
I can type
j pla which will cd me into that directory.
It also works for files, for example I have a file
v boo and it will open it up in vim.
Concerning the vim part of the video, I would love if you used a tool that shows which keys are being pressed.
For documentation there is a great vim plugin https://github.com/Keithbsmiley/investigate.vim that opens up documentation in dash or in browser.
If you are on Linux there is a less sexy version of dash http://zealdocs.org/ and instead of alfred you can use Synapse.
Fish shell is amazing, but it will still be some time before the community embraces it and tools like rbenv/chruby come with support for it out of the box.