I have to admit that until a few months ago I was posting YouTube links on Facebook to promote my videos. It was fine but then I realised that uploading videos directly to Facebook and sharing them in native format generates a lot more engagement. Now I always upload my videos direct to Facebook and the difference is HUGE. I am confident that your brand will get more visibility if you do the same and this will also lift all your content in Facebook, so give it a go.
Now at this point not mentioning Facebook Live would be almost criminal. It used to be only for celebrities but now everyone can go live on Facebook. This is an amazing tool to showcase your business or products because being live removes any doubts you potential customers may have. Even if they watch it later as a recording, the fact that you gave a live demo would always make them more confident about your business and your product.