Nipping Inaccessibility in the Bud: Opportunities and Challenges of Accessible Media Content Authoring. - Carlos Duarte; Letícia Seixas Pereira; André R. B. Santos; João V. Vicente; André Rodrigues 002; João Guerreiro 002; José Coelho 002; Tiago João Guerreiro 001 (WebSci (Companion), 2021)