Thank you so much for subscribing! I'm a total noob when it comes to video editing but I'm learning as much as I can. To answer your question, the easy way is to add it after you upload your video using RU-vid studio on left hand side. It says subtitles. The harder way that I'm learning right now is to use the free website Capcut.com. It's really cool. But here is the easy way video that helped me out a lot last year. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-cItcOUjqoEs.html (Go to minute 4 for this video to help you) I hope this helps you make great videos. Once you upload videos on your channel I will subscribe too!!