Maybe a reasonable approach would be a short default copyright time with the option to renew it every 5-10 years for a big sum of money. This will prevent copy

Maybe a reasonable approach would be a short default copyright time with the option to renew it every 5-10 years for a big sum of money. This will prevent copyright squatters on works with high value for public but lesser monetary value, like WWII footage just collecting dust as mentioned in the article.