This study uses a quantitative research method with a true research design an experiment with the type of posttest- only control group design which aims to test the effect of using the YouTube application on the results of learning Arts and Culture in class X UPT SMK Negeri 2 Sidrap. The population of this study is all students of class X SMK Negeri 2 Sidrap with samples taken of 18 students of class X BRT 1 SMK Negeri 2 Sidrap and using the Purposive technique sampling. There are 2 variables in this study, namely the effect of using the YouTube application (independent variable) and the learning outcomes of Class X Students' Cultural Arts (dependent variable). This research was conducted in class X UPT SMK Negeri 2 Sidrap. Data collection techniques using documentation and tests. Data from the test results that have been collected are then analyzed using the mean and t.test formulas . Based on the results of data analysis, the experimental group value = 85 and the control group value = 66.111 and the t test obtained T count 5.897 > from T table 5% (2.120) with db 16 . Based on the results of the study it can be concluded that the use of the YouTube application has an effect on the learning outcomes of Cultural Arts class X UPT SMK Negeri 2 Sidrap