enhancement: WordPress.tv: add an optional slug field for the video submission form

[Nao]

Current submission form at ​http://wordpress.tv/submit-video/ generates a post where the slug is the title field.

For some locales such as Japanese, the auto-generated slug is problematic because it uses percent-encoding and can be 1) hard to read, 2) very long, and 3) just not pretty.

The slug for a video titled "CMS四天王への攻撃デモを通じて、WordPressの効果的な防御法を学ぼう" will become:

hiroshi-tokumaru-cms%e5%9b%9b%e5%a4%a9%e7%8e%8b%e3%81%b8%e3%81%ae%e6%94%bb%e6%92%83%e3%83%87%e3%83%a2%e3%82%92%e9%80%9a%e3%81%98%e3%81%a6%e3%80%81wordpress%e3%81%ae%e5%8a%b9%e6%9e%9c%e7%9a%84

I'd like to request an addition of an optional custom slug field.