The National Learning Camp (NLC) serves as the national recovery program of the Philippine Department of Education (DepEd) using a camp-like learning experience. Hence, learning materials were distributed to the students, and teacher-student interaction was limited to forty-five minutes, insufficient to cover all required lessons. So, teacher-made video lessons aligned with the learning modules were shared with the students via a YouTube channel to address the problem. The study used a practical action research design aiming to supplement the learning materials of the national learning camp for Grade 7 students. The participants were sixty grade 7 students selected purposively. The validated survey questionnaire, interview guide, and reflection notes from the experts in mathematics education were used to collect data. Findings revealed that the teacher-made video lessons via YouTube supplement the learning materials of the national learning camp. The students evaluated the said interventions as effective materials in terms of content, audio-visual presentation, usefulness, and aesthetic value. The video lessons were easy for the students to understand since the mathematics teacher explained the content loudly and aligned it with the students' workbooks. However, the students requested more video lessons with more examples and explanations in the Filipino language to understand the content better.