Search for references on different resources, don't limit yourself to one platform.
Of course, the most popular place is YouTube, but we would recommend to safe it for later. Mainly because it's designed for the masses, so from all the variety of content it's easy to get lost.
Here are few more professional websites for searching references:Vimeo
It is created by filmmakers for artists, directors, animators and other creative people. Therefore, there are much more aesthetically valuable videos on this site than on YouTube. On Vimeo, videos are sorted by category and there are thematic channels where the content is broadcast. Another cool feature of this video hosting is Staff Pick selection. Vimeo Editorial staff regularly watches the loaded video and publishes the best works in their opinion.Behance
Another professional community for artists, illustrators, photographers and animators, where they share their portfolios. The main difference of this resource is that you can see not only the finished project, but also the creative process.Dribbble
A special place for designers, illustrators and 3D visualizers. The service is more suitable for finding stylistic solutions, as it contains only images and GIF files.