German Olympic athletes can share short smartphone videos from Olympic venues and the opening and closing ceremonies on social media from the upcoming Paris Games onwards in a further relaxation of rules, Germany’s cartel office said on Wednesday. The cartel office had deemed strict advertising rights and other restrictions imposed by the International Olympic Committee (IOC) and German Olympic Sports Confederation (DOSB) unlawful in a 2019 ruling. It now said that the IOC and DOSB have updated these guidelines which include allowing athletes to stay in touch with their fans via social media i…