One can invoke * promote in case one is entitled to do so - which makes the sift go to the queue. So far there's no *pq invocation..see a previous discussion:
http://www.videosift.com/talk/PQ-invocation-for-discarded-videos

doogle with a *quality idea! Yes this would be great.

Awarding doogle with one star point for this contribution to Sift Talk - declared quality by youdiejoe.

interesting........
I like yer *undiscarded attempt-after you tried begging.!!Heh! Never used beg....
Why not, bells and whistles, whistles and bells-

Actually, I think you can self promote them back into your queue.

Just wondering if there was an update...

For now...and I'm sure others as well, have been either spending Power Points to get them *promoted and then into the *pqueueue or I appeal to an experience user (like blankfist) to *promote them...

Maybe it isn't a bad idea that people need to use up Power Points to get them out of discard, but if this is the practice, it should be better known, and many can resurrect those gems lost and forgotten among their calendar-inconvenient-forgot-to-invoke-*requeue-in-a-fussy-way days...

(Wow I've been on VideoSift too long if that made sense to me...)