Lisa Irwin was reported missing on Oct. 4, 2011. (NBC News: Photo courtesy of Lisa's grandparents - Rickey and Melanie Irwin)
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Videos posted on YouTube from when Lisa Irwin was still with her family show a smiling, happy baby.
NBC Nightly News Peter Alexander shared the video's with NBC Action News. The videos were posted on YouTube between seven and nine months ago.
11-month-old Irwin has been missing for 10 days.
Lisa's parents, Deborah Bradley and Jeremy Irwin, reported their daughter missing early Oct. 4, saying she disappeared from her crib at their single-story home sometime overnight as her mother slept in a nearby room.
Hundreds of local, state and federal investigators have been looking for the child ever since, scouring through hundreds of tips and repeatedly searching the family's neighborhood, nearby woods, sewers and a landfill. But police said they have no suspects or solid leads.
The Associated Press contributed to this report.
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