If you get video of someone doing it, the police won't want to look at it though. Video of someone doing stuff might be used in civil court if you know who it is and you sue. Mostly you'll just get to watch someone vandalize your property and get angrier.
I do need to get cameras for multiple reasons. I can't get a bigger sign, unfortunately. The organization only has them in one size. I am going to get a bunch and just have a stockpile to replace them immediately.
Install cameras, buy a drone, and the next time you catch one defacing your yard, follow them home with the drone. Now that you have their address, you can go in when they're sleeping and shit in their shoes.