I'm developing a karaoke app. I used two different players when I wanted to synchronize the music and the video that the user shot. However, in this case, I am faced with a constantly variable starting difference between music and video (like 10-15 milliseconds). If it is possible to start the video and music file simultaneously, I believe I can solve my problem. Sometimes I need to use mp4 as a music file. For this reason, I am looking for a way to be able to start two different videos simultaneously. Thank you in advance for your support.