Summary: Seko adds "数字人视频" feature.

Why It Matters: This new feature lets users make digital people talk. It makes video creation easier for them.

What Changed:

• A new menu item "数字人视频 NEW" was added.
• A new section "数字人视频 - 全新上线 🎉" was added.
• This new section lists features:
  • Supports multiple people speaking at once.
  • Can upload sound files.
  • Can change voice and feelings.
• The example text for "剧本创作" changed.