Having problems seeing a Participant's video or presentation in Meet ? Try changing your Video Settings in Meet to Standard Resolution for both sending & receiving. See this article for full details
Change your computer’s video and audio settings
Adjust your camera, microphone, and more to get the settings you need.
Camera—Select your camera device. If your camera is working, to the right of Video, you’ll see your video feed.
Send resolution—The image quality from your device that others see.
High Definition (720p)—(Available on computers with a quad-core CPU or higher) Uses more data, but your camera will send a better quality picture.
Standard definition (360p)—Uses less data, but your camera will send a lower quality picture.
Receive resolution—The image quality that you see from other participants.
High Definition (720p)—(Available on computers with a quad-core CPU or higher) Uses more data, but you see a higher quality picture.
Standard definition (360p)—Uses less data, but you see a lower quality picture.
Standard definition (360p)—(single feed) To save more data, the other participants' thumbnails turn off.
Audio Only—To use the least amount of data, you won't see any video.
AUDIO/SOUND Issues:
Tip: Using mismatched microphone and external speaker devices may cause echo. It is recommended to use a headset for best audio.
Change your speakers and microphone for Google Meet. While in Meet: click Settings Settings and then General.
Speakers—Select your speakers. To test your speakers, click Test.
You might also want to decrease the quality of your video if you experience:
Video or audio delays
Poor network connection
Low battery
Limited data available