The reason users encounter the no sound issue when downloading videos from Youtube with IDM is because this download support software automatically fetches all possible links to display. For example, sometimes an MP4 video file will be split into both MP4 and M4A, so if you don't pay attention and download the M4A video file, you will only hear the sound without seeing the picture, and vice versa.
How to fix no sound issue when downloading videos from Youtube with IDM
Step 1: Download the MediaHuman Youtube Downloader software to your computer.
Step 2: Next, open the Youtube Downloader. The software interface will look similar to the one below.
Step 3: Go to Youtube and copy the link of the video you want to download, then click the Paste URL button.
Step 4: After pasting the link, click on a similar icon below to start the download process.
The video plays with both audio and video.
So, we've just guided you on how to fix the issue of videos having no sound when downloaded from Youtube using IDM. In reality, if you encounter issues with IDM, you can simply use another Youtube video download tool to resolve it. Additionally, check out our easy and high-speed Youtube video downloading services that we provide.