If you want to playback full HD or higher-than HD resolution content (2k, 4k, etc.), you'll probably want to look into a dedicated media server that is purpose-built for use in such a manner. Dedicated video outputs, fast HDDs, lots of RAM, dedicated Graphics cards, etc. - they're on-trick ponies, but they do it well.
As for the projection itself, double-stacking & converging may be required, as well as blending 2 stacks of double-stacked/converged projectors due to the width you're dealing with and the ambient light that you will, inevitably, have issues with.
It's not cheap or easy to execute something like this and have results that you see from viral videos on Youtube...there is a lot of skill and gear needed.