Thank you for that video example @Nirvana8517! The audio heard in that video is likely due to the idol or low sound environment. With the microphone not having any direct audio to pick up, dead air or environmental noises can certainly be heard. There doesn’t looks to be any static or feedback, and the video looks smooth and clear in operation. This is a great sign that network connection is sufficient.
This sound is nothing to be concerned about, but to be sure, it is best to test videos where there are two way conversations, or consistent direct audio, to ensure the intended audio is being delivered without interference. I hope this helps! 