I am at work so have not watched the video, but if I may chip in on the wider topic, and please forgive me if this post becomes a little rambling.
I have been diagnosed with, and receiving medical treatment (i.e. drugs) for depression since November 2007. There are better times, there are worse times, but it never entirely lifts. The roots of it go much further back than the diagnosis.
As soon as you get depression, you get bombarded with opinions. Therapy is best, meditation is best, drugs are best . . . you're lazy, you're a poor thing to be pitied, you're weak, you're strong . . . and the trouble is, a lot of this comes from 'experts' - a psychiatrist who is 100% medication-focused and a counsellor who is into meditation, simultaneously, is quite confusing!
My conclusion . . . or, well, my working theory, is this:
(i) Depression is a meaningless term. It is applied to everything from someone so ill they are in and out of hospital, to people who are going through a few bad months after a divorce, to people like me who are (apparently) permanently ill, but not in immediate danger of harming themselves. I personally believe there are as many forms of depression as there are people with depression, but even setting that aside, the category as it stands is way too broad.
(ii) Point (i) leads to bad treatment. The person going through a divorce could probably be helped by counselling and spared the multitude of problems that drugs can bring. The person in a severe crisis may actually be harmed by therapy (particularly now that the only form available on the NHS is CBT - if I get into my opinions on that, this post will become unreadable . . .)
(iii) How does this tie into meditation? I believe meditation can be helpful. I believe many aspects of spiritual practice can be helpful. They can also be hugely harmful. For me, my introduction to meditation was through a useless therapist, at a time when I could barely get out of bed, who was pushing me to modify my entire life, including building up fast to 1hrs meditation a day. I simply couldn't do it, I was too ill, and this added pressure made things even worse. Not only was the therapist pushing the wrong thing for me, she didn't seem to actually have much understanding of meditation - a brief read of wikipedia and some lurking on eSangha opened up a plethora of issues. I have a bad history with religion, so even if I had had the ability to meditate, to be simply thrown into it blindly was not helpful. This leads to point (iv) . . .
(iv) Meditation can take you inside yourself. Without proper guidance, it can be alarming. On the one hand, if it can be made as secular as possible so more people can benefit, that sounds good. On the other hand, doing that seems to be to strip away key aspects/ways of understanding and processing the experience. Moreover, even in a Buddhist framework, it may be misapplied. For example: I went through a very bad phase about a year and a half ago. Nights of really intrusive thoughts of suicide. One time I managed to sit with it, bring attention to the breath and the present moment, and calm myself. Another night I tried that again and it was terrifying. Fortunately I had the sense not to push it - I put on a trashy film and indulged in pure escapism. Had I been more committed to trying to be a 'proper' Buddhist (as opposed to surviving) I might have pushed that, tried to force myself through it, with bad results.
I don't think meditation should be dismissed as a tool to help depression - but nor should it be seen as the only tool, and it must be handled with caution, and above all, with attention to the individual. Someone else with long-term depression, superficially similar to mine, could come into this thread and write a totally different post - and not be wrong, just going through a different experience of depression to me.
I think that will do for now - I have some fairly strong views on therapy, the NHS, and on the merits (or not) of monks (and religious leaders, doctors, friends . . . ) expressing their personal idea for 'curing' depression, but in the interests of keeping this not too long and reasonably rational (and me getting on with my job), I'll leave it at this for now.