You need cam plus or cam plus lite to get the 12 second CLOUD event video recordings. If you don’t have either you will just get thumbnail photos. The videos will not back up to the SD in the base if you have cam plus, I am still not sure if it works with Cam plus lite? The SD card in the cameras will only have numerous thumbnail photos unless you are doing scheduled recording. The SD in the WCO is for travel mode, Time Lapse and scheduled recording. There is no playback on the WCO, but if you are doing scheduled event recording to the SD card in the camera the videos are saved in the camera album and may be viewed from there. When viewing from the camera album the video will open and play when selected, but it will also be saved to your device (Phone/tablet/iPad) photo album. I have 4 WCO and they are all doing scheduled event recording to the SD cards.
https://support.wyze.com/hc/en-us/articles/360037595072-Scheduled-Recording-on-Wyze-Cam-Outdoor