Create Youtube API key as described here.
Create .env file with this API key as shown in .env.template:
YT_API_KEY=BIzaXiO_1J4s7vukMpFyjODxDo87l9-bR1oKcnx
Install necessary libraries:
bundle install
You are ready to go:
ruby 1_markdown_links.rb
ruby 2_pageviews_data.rb
ruby 3_plot_survival_curves.rb
ruby 4_filter_exceptions.rb
ruby 5_survival_rates.rb