A member of the Cyborgs, Kostenko fought at the Second Battle of Donetsk Airport during the war in Donbas, for which he was awarded the Order of Bohdan Khmelnytsky, as well as the 2022 Russian invasion of Ukraine.

[3] In 2008, Kostenko moved from the 79th Air Assault Brigade to the Alpha Group, within the Security Service of Ukraine, in spite of his parents' protests and the lower pay.

[2] During the early stages of the war in Donbas, Kostenko chose to fight the separatist forces of the Donetsk People's Republic, using vacation days he had saved up to go to the front with the 79th Air Assault Brigade, his former unit.

[6] In 2022, immediately following Russia's invasion of Ukraine, Kostenko returned to active duty, travelling south to fight Russian soldiers attacking the city of Mykolaiv.

[1] Kostenko led an ad-hoc special forces group that destroyed the bridges over irrigation channels around the city, helping to halt the Russian advance.

In the video, he humorously stated that he had entered the Kursk Region of the Russian Federation without a business trip, promising Verkhovna Rada Speaker Ruslan Stefanchuk that he would issue one later.

[2] In July 2019, in a 2019 interview to the Tsensor.NET website, Kostenko announced he was joining the Holos party, campaigning on a policy of bringing an end to the Russo-Ukrainian War and making Ukraine a "successful and comfortable country for life."