1. The format factory software shown in the installation drawing 1.

Second, then click on webm next to it.

Third, click here to add.

Fourth, select the downloaded video that needs to be restored.

5. Click here to confirm.

6. Then click this to start.

Seven, see the converted video size here, just wait for the conversion.

8. Then click the output file.

9. Then you can see the converted video file size.