According to TechCrunch, the developers of Instagram without any ads changed the mechanism of auto-play video.
Before video social network default played without sound. In order to turn on the sound, you had to click on the video. To click on a special icon in the lower left corner of the video every time the user wanted to view it with sound.
Now videos in the news feed of Instagram still will be played without sound, however, after the user turns off the sound in one of them, all of the following are played with the sound.
At the next launch of Instagram video will start without sound for as long as one of them not to include.
Similarly, the function works in the opposite direction. If the user needs to see only one movie with sound, next you need to turn it off and on all the videos are played without audio.
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