BEIJING—Figure skater Kamila Valieva will testify by video at an appeal hearing Sunday that will decide if the 15-year-old Russian star can still compete at the Beijing OIympics despite an ongoing doping case. Just 30 minutes ahead of the hearing’s scheduled 8:30 p.m. start in Beijing, Court of Arbitration for Sport director general Matthieu Reeb said Valieva was scheduled to speak by video to the panel in a case that has caused havoc with a marquee sport at the Olympics. “The athlete will be online and she will testify,” Reeb said. “We suppose she will speak in Russian, and we have an interpreter.” Three CAS judges are hearing arguments in a closed-door session in a conference room at a Beijing hotel. Lawyers and officials for the parties are connecting to the case in the Winter Games host city and from Switzerland. Reeb said witnesses and experts would also be involved. …