The video states that fallout shelters are built to accommodate people for a maximum of two weeks, and possibly less, depending on the radioactivity of the fallout.
In this WIRED video, nuclear historian Alex Wellerstein answers a variety of questions about nuclear weapons, their history, and their implications. He addresses topics such as which countries possess nuclear weapons, the decision-making process for proliferation, the rationale behind the bombings of Hiroshima and Nagasaki, the concept of the nuclear football, and the science behind radiation and enriched uranium.