Help with this query (some join stuff I think)

I've got a bunch of companies that are associated with several videos.
The videos have different statuses. I want to select all the
companies in the database, and order them by videos that have a
complete status.

Here's what I have so far

SELECT
companies.id,
companies.name,
companies.nickname,
COUNT(company_id) AS num_videos
FROM companies
LEFT JOIN videos ON companies.id=videos.company_id
GROUP BY
companies.id,
companies.name,
companies.nickname
ORDER BY num_videos DESC
LIMIT 10

This orders the companies by number of videos...but it says nothing
about the video status. If I include a
WHERE videos.status='complete'

then it filters out the companies that have no complete videos. I
want to include those companies in the result set though, saying that
num_videos is 0.

Anyone know how to get that done?

Pat