When you create or invent something, you need to protect your copyright at the same time. Whether you like or not, there are always certain types of people exist whose nature is just good at stealing one’s ideas. The most important thing you need to do to secure your copyright is to publish your work widely along with clear publication date that can not be fabricated. This authenticity of your publication date is very critical.
To do so, I personally recommend using YouTube. YouTube is probably the most handy and widely trusted platform you can use for this purpose at free of charge. If you publish your works via YouTube, people can clearly see who made what and when. False claimers simply do not have such evidence and 100% always fail to prove the publication date that they claim. The idea of ultimate advantage of this method is not to give them a chance in the first place. If they see your publication date is secured, they most likely will not bother you.