The current study aimed at developing the experimental preparatory language school students 'EFL speaking skills through using a strategy based on online vlogs. The researcher adopted quasi-experimental design of two groups: control group (n=40) and experimental (n=40). The participants were (80) students from Minya Elqamh Experimental Preparatory Language School, Sharqia Governorate, Egypt. The experimental group was taught by using the strategy based on online vlogs while the control group received the regular instructions in the second semester of the academic year (2022/2023). The experiment lasted for 10 weeks. The researcher carried out 10 sessions; each session took about 180 minutes; four periods per week; Each period took about forty -five minutes. To achieve the aim of the study, the researcher prepared three instruments: a questionnaire for determining the most important EFL speaking skills suitable for the first-year experimental preparatory language school students, the EFL Speaking Skills' test for measuring the students' proficiency of EFL speaking skills and a rubric for analyzing the students' scores. The instruments were validated by a group of jury members. The data obtained were statistically treated through the SPSS program version (23). Results indicated that the experimental group outperformed the control group as a result of adopting this strategy.