| Pos | Video | Viewcount | | Published |
|---|
| 1. | LIGHTSUM(라잇썸) DEBUT TRAILER | 512,640 | | 2021-05-02 |
| 2. | LIGHTSUM(라잇썸) - PROFILE FILM : 초원 CHOWON X 지안 JIAN | 494,869 | | 2021-04-19 |
| 3. | LIGHTSUM(라잇썸) - PROFILE FILM : LIGHTSUM | 492,171 | | 2021-04-22 |
| 4. | LIGHTSUM(라잇썸) - PROFILE FILM : 히나 HINA X 유정 YUJEONG | 439,412 | | 2021-04-21 |
| 5. | LIGHTSUM(라잇썸) - PROFILE FILM : 상아 SANGAH X 주현 JUHYEON | 426,087 | | 2021-04-18 |
| 6. | LIGHTSUM(라잇썸) DEBUT TRAILER : INTRO | 374,061 | | 2021-04-29 |
| 7. | LIGHTSUM(라잇썸) - PROFILE FILM : 나영 NAYOUNG X 휘연 HUIYEON | 286,224 | | 2021-04-20 |
| 8. | LIGHTSUM(라잇썸) - U CUBE LIGHTSUM CLUB OPEN | 286,036 | | 2021-04-23 |
| 9. | LIGHTSUM(라잇썸) - CHARACTER FILM : 주현 JUHYEON | 230,252 | | 2021-05-03 |
| 10. | LIGHTSUM(라잇썸) OFFICIAL LOGO ANIMATION | 187,251 | | 2021-04-14 |
| 11. | LIGHTSUM(라잇썸) - CHARACTER FILM : 초원 CHOWON & 나영 NAYOUNG & 지안 JIAN | 181,585 | | 2021-05-11 |
| 12. | LIGHTSUM(라잇썸) - CHARACTER FILM : 히나 HINA & 휘연 HUIYEON | 108,938 | | 2021-05-05 |
| 13. | LIGHTSUM(라잇썸) - PR INTERVIEW 'In My Life' : 주현 JUHYEON | 100,063 | | 2021-05-04 |
| 14. | LIGHTSUM(라잇썸) - CHARACTER FILM : 상아 SANGAH & 유정 YUJEONG | 75,896 | | 2021-05-09 |
| 15. | LIGHTSUM(라잇썸) - PR INTERVIEW 'In My Life' : 히나 HINA | 58,402 | | 2021-05-06 |
| 16. | LIGHTSUM(라잇썸) - PR INTERVIEW 'In My Life' : 휘연 HUIYEON | 42,668 | | 2021-05-06 |
| 17. | LIGHTSUM(라잇썸) - PR INTERVIEW 'In My Life' : 초원 CHOWON | 41,995 | | 2021-05-12 |
| 18. | LIGHTSUM(라잇썸) - PR INTERVIEW 'In My Life' : 상아 SANGAH | 33,625 | | 2021-05-10 |
| 19. | LIGHTSUM(라잇썸) - PR INTERVIEW 'In My Life' : 나영 NAYOUNG | 30,215 | | 2021-05-12 |
| 20. | LIGHTSUM(라잇썸) - PR INTERVIEW 'In My Life' : 유정 YUJEONG | 29,181 | | 2021-05-10 |
| 21. | LIGHTSUM(라잇썸) - PR INTERVIEW 'In My Life' : 지안 JIAN | 17,048 | | 2021-05-12 |
