Protasevich sat alongside officials, saying he had not been made to cooperate with the authorities and that he was in good health after being arrested last month when his Ryanair flight was forced to land in Minsk on May 23.
Protasevich has made several appearances since then. He has admitted to plotting to topple President Alexander Lukashenko by organizing "riots" and recanted earlier criticism of the veteran leader.
Previously, authorities have said Protasevich is an extremist who has facilitated violence. They have maintained that televised confessions by members of the opposition were made voluntarily.