Alexa

I have been contemplating on getting an Alexa mainly for health reasons incase I fall etc.
However, now I would like to knowif anyone has an Alexa does it take a video of anyone on my front lawn?
I ask as. living on my own, I have had trouble with a young lad who I believe has now been killing my lawn. I heard from a young lady who lives near to him that he never bothered to attend school during his last year and now just sits around in a council house.