Instagram is taking a different route with the user’s autoplay video sound. It takes into account the user’s preferences during their browsing session and keeping it consistent during the entire time they spend on app.
Let’s explore a little more
When Instagram is opened by the user, the default video will be played sans sound. But, if the volume is turned on for a particular content, the Instagram will remember it and play all the subsequent video with sound.
More excitement on viewer’s part
Instagram announced that adding sound on the platform will be more enjoyable to the audience. But, the Stories video will not be affected by this change. In Instagram Stories the video will be played only when it is unmuted.