Dear, what you need is equivalent to shooting an MV, which is to synthesize the video screen and the recorded mp3 file. You can use clipping to achieve this. The specific steps are as follows:

1. Start clipping. Screen, import your videos and recordings, and drag and drop them to the timeline;

2. Start editing the video footage so that it corresponds to the recording (depending on the operator's proficiency and familiarity with the content) );

3. Click "Text" on the toolbar -> "Recognize Lyrics" -> "Start Recognition" to add synchronized lyrics to the video;

4. Check the generated lyrics Proof the subtitles. After completion, click "Export" in the upper right corner.

If you find it useful, please adopt it, thank you!