Grey images or videos that keep spinning almost always come from the network or a cache that needs refreshing.
- Check your connection and give the content a few seconds to load.
- Pull down the screen to refresh the feed.
- Switch between Wi-Fi and mobile data: one network sometimes blocks video.
- Update the app, then relaunch it.
Reels play as a stream; on an unstable connection they may pause while buffering. You don't need to lower the video quality, the app adapts to your bandwidth.
If a single listing stays without a photo while everything else loads, the seller may be editing it. Try again a little later.