The 1973 oil embargo led to an increase in oil prices and had a profound impact on the global economy. This event might have been confusing and concerning for adults, but for children, it meant rising gasoline prices and possible shortages.
Common in Russian-language forums and social media posts as an abbreviation for “update” (upd: добавлено/изменено). Indicates that the original post or video description was edited, possibly to add new information, a corrected link, or additional footage. In this context, “upd” may signal that the user is looking for the latest version of a post from 1973-era content.