This brings up a point though. How can you mark the video / trigger alerts based on other sensors? This article covers that question pretty well for Blue Iris. Basically it comes down to this.
Set your alerts to be retriggerable by checking "Also re-triggers"
Then call the trigger via a URL get in the form of
For instance to try from a browser assuming:
Your Blue Iris server is on IP address 10.10.2.46 on port 8076 and you wanted to trigger IPcam62 Note that is that is the short name on your properties screen.
And your login is admin/P@$$w0rd
You would call http://10.10.2.46:8076/admin?camera=IPcam62&trigger&user=admin&pw=P@$$w0rd
You should see a response like
If you see camera=NULL you have mistyped the camera name.
To trigger from Homeseer you would create an event like
To go the other way (trigger Homeseer form Blue Iris) see this post in my automation blog.
Other home automation systems are similar.
It is just that simple to get every motion event marked on your video to make finding the right footage easy. If you find the motion sensor is working well enough, you can even turn off Blue Iris' motion detection the save a good bit on CPU load though I prefer to leave it on just tuned to the insensitive side.