1. Open the source file for making video. I use EDIUS to make software. 2. Find the corresponding subtitle file and double-click to open it. 3. Use the text tool to modify the text, and adjust the text spacing at the same time, so as not to let the text go beyond the safe area. 4. Then modify and save the subtitle file. 5. Next, choose the output format of the video, preferably the same format as the original video.

6. The easiest step is to find the video to be modified and overwrite it.