How to Change send 'Immediately' to send in 30 seconds or...

Using a video thumbnail plugin that sets the video thumbnail as featured image when it gets published, so no images gets included in SBE...can the 'send immediately' be changed to set or select a delay...?

BTW, last word of line 440 in plugin PHP - 'immediately' is misspelled 'inmediately' - just updated to 2.4.2