Download training videos

# Download training videos for easy viewing.

# :1: Get `youtube-dl`
brew install youtube-dl

# :2: Add this to your `.bash-profile`
alias yt='youtube-dl -f best'

# Now to download any video, just type `yt` followed by the video URL
# In the case of a youtube video, this will select the best available option and download it
# To avoid geography-based censorship, add `--geo-bypass` to the string.

# Don't have homebrew?
# Get it here: https://brew.sh