What quality do you have the camera set to? What is the signal strength?
When you are viewing the recording playback, are you watching on the alarm.com website or the Smart Home Security app on a mobile device? When watching, are you connected via WiFi or using cellular LTE?
Try downgrading the recording resolution to 720p for a day or 2 and see if that improves recording quality. The WiFi signal to the camera may be ok but it might be on the weaker end of OK and would explain the issues with glitchy recordings.