Please be aware this forum is not youtube or associated with it and is, in the main, an anti youtube forum.
While it is devastating to you what has been happening (and quite rightly so) there is nothing we as a community can do to help you in this as it is not us that need a guide nor is it the duty of the site to educate the unwashed of the youtube 'urbex' crowd.
Just like that nob that has been caught carving his name into the colloseum recently they think they can do as they like to get social likes and the more exposure they get the more likes they get, if they can boast someone tried to fight them on site they are even happier.
Moving forward here are some suggestions that may help you better than making this thread here (which incidentally may have got a better reception if it was a friendly information post suggesting place X is not abandoned and it would be appreciated if it wasn't visited).
Put a sign or 2 up saying your property is not abandoned and people are living in it. You're right not all trespass is a civil matter but it's unlikely your living in a building that constitutes criminal trespass. Breaking and entering most definitely is a crime though but the two instances are different.
Suggest trespassers will be prosecuted on all signs.
Go through YouTube and list off those people with videos showing them on your property, take screen shots or ideally rip the video then launch proceedings against them, the evidence is there and the police can trace them. Even if its a no win no fee company and you get no money out of it you set the precedent that trespassers are not welcome.
Make sure your property is secure and if possible equipped with security cameras even if its a hidden trail camera pointing at entrances its a visual evidence that the police can act on.
Call the police to every instance and make sure they are fully aware your property is being invaded, ask for regular drive bys.
Photograph your property including all security and doors. When someone enters your property uninvited you then have somthing to show the police what has been broken or stolen.
I think i speak for everyone in saying we're sorry to hear your being broken into but now you've got to be more proactive than fighting with intruders and grumbling on an exploring forum.
Good luck.