Younghusband was first called up to the Philippines national under-23 football team in 2005 after a gamer discovered his Filipino eligibility while playing Football Manager and notified the Philippine Football Federation.[6][7] Younghusband received his first senior team call-up the following year.[3] In his second national team appearance, he scored his first four international goals against Timor-Leste during the 2007 AFF Championship qualification.[4] His 12th international goal was scored against Vietnam in a match dubbed "The Miracle of Hanoi"—Younghusband's goal secured a win for the underdog Philippines and sparked a football renaissance in the country.[9][10] Younghusband's 50th international goal was a penalty kick against Tajikistan during the 2019 AFC Asian Cup qualification.