If you are hesitant to pay for the full Leawo license (which currently costs around $40-$45 for a lifetime license), there are legitimate alternatives you can consider that are free and legal:
The free version of Leawo Blu-ray Player is surprisingly powerful. It allows you to play discs and files without watermarks, which is rare for free software. However, the free version has one major limitation: it only works for 30 days as a "trial" for DVD/Blu-ray menus, and it lacks advanced features like multi-channel audio output (5.1/7.1 surround sound). leawo blu-ray player registration code