VIDEO RESOLUTION

I have decided to render my video in 1080p. The problem with this is that the file size is very large for a 1 and a half minute video (almost 8gb!). Although the video took a long time to upload to YouTube, it was worth the wait. By producing the opening in 1080p, I feel like I am creating a video more similar to what would be shown on the big screens at the cinema. On a large screen, at 720p, there is a lot of graininess which looks unprofessional is not part of the cinema going experience.