This is the million-dollar question. The legality depends entirely on the nature of the YouTube video being shared.
Traditionally, filmmaking was a costly and exclusive endeavor, limited to those with significant resources and industry connections. However, with the rise of YouTube and YTCinema, the barriers to entry have been significantly lowered. Today, aspiring filmmakers can create and distribute their content to a global audience with minimal investment. This democratization of filmmaking has led to a proliferation of diverse voices, styles, and perspectives, enriching the cinematic landscape.
That being said, if you're looking to create a post about YTCinema links, here are some possible directions you could take:

