This classroom action research aimed to improve the active participation and descriptive text writing achievement of the tenth-grade students. Observation and a writing test were used to collect the data, and the collected data were analyzed by using percentage and mean score. The analysis results from observation showed that there was an improvement of the students’ participation in the teaching learning process of writing by using YouTube videos from 70 % in the meeting 1 and meeting 2 to 80 % in the meeting 3 and meeting 4. In addition, the mean score of the students’ descriptive text writing test also improved from 55.9 in the pre-action up to 78.7 after the post action. The number of students gaining the passing grade of 75 or more also improved from 35% in pre action to 75 % after the post action. So, It could be concluded that the use of YouTube Videos could improve the active participation and descriptive text writing achievement of the tenth-grade students. Therefore, English teachers are suggested to use YouTube videos for teaching descriptive text writing.