I understand how important it is to be able to record events inside of your home so you can see what's happening even when you aren't there.
There are specific daily quotas for the video clip and picture recordings as part of your rules. It is 100 Videos / 400 Pictures per day, do you recall if you had more than those in a single day when the recordings stopped taking? You could upgrade to a higher Video & Picture Storage option which would give you 600 videos / 1000 pictures per day.
Did you know, you also have the option to record 24/7 for up to 1-week of HD quality video from a single camera? The data is stored locally on the Touchscreen via a 64 GB Class 10 Micro SD Card or full-sized SD card depending on the model of your Touchscreen.