Poodll Subtitle for Atto has been released in the Moodle.org Plugins directory. Poodll Subtitle is a subtitle editor for audio and video files in Moodle. It works in the Atto editor (TinyMCE support soon) You can create and edit subtitles. The subtitle file will be saved in the HTML area.
Poodll Subtitle has no dependencies and requires no service subscription (ie It's free!). It also works great for editing subtitles generated automatically with Atto Cloud Poodll.
You can read more about it and get from this page: