The software manager ykv can be converted to mp4, and professional video format conversion tools can be used. The method is as follows:

1. Open the downloaded Rainbow Office Center, click the "Video Processing" module, and then click the "Video Format Conversion" function on the right (conversion between conventional video formats is supported here).

2. Click "Add File" to add a local ykv format video, or drag and drop it to the page to complete the file import, and select the adding method.

3. After importing the ykv format file, click "Format" under the output column on the right side of the file and select MP4. You can also set the video resolution. After setting, find the output directory in the lower left corner, set the file storage location, and click "Start Processing".