Uploadify
Uploadify is a jQuery Plugin that allows you to add a multiple HTML5 or Flash file upload functionality to your website. The plugin also has multiple features that will enhance the user experience including: drag and drop ability, real-time progress indicators, custom upload restrictions, and advanced customization. So if you are looking to build your own user-generated video library for your website, or just really like posting cat videos to your blog, click here to view the demo and learn how it works.