I found John Bridcut's programme a solid bit of craftsmanship and certainly a relief after the Radio Times blurb which wrote about 'a sizzling documentary revealing Ralph the impulsive heartbreaker...'
Reminded me of a pleasant evening at the theatre which, try as I may, I cannot clearly recall a week later.    With a duration of 90 minutes, I expected a bit more from the passion of the director and this is why I'd always give precedence to Russell or Palmer at 55 mins and 2hrs 25 mins respectively.

Sadly, the immediate answer is that they almost certainly have never had a complete video cycle, and much of what they may once have had has long since been lost, often, tragically, just dumped in a skip. The long-awaited appearance of the Britten-Pears archive recordings on DVD this month bears witness to this: these were arguably National Treasures which should have been preserved for posterity, but the BBC were unable to locate them: it took painstaking research on the part of Decca staff to locate the material, some of it completely mislabelled.

It's also questionable whether what they still might have would be of high enough quality: the great performances of the past (for example a Proms fourth in the mid-sixties, conducted by Boult, which I attended and later saw televised) would probably be passed over even if they were still to exist because they were monaural and monochrome: not all the more recent performances at the Proms, even if televised, have been particularly brilliant.

Do televised concerts sell particularly well, in any case? Whilst I've argued over at TOP (The Other Place, i.e. the BBC board) within the last twenty-four hours that the Shostakovich symphonies gain from experiencing their visual aspect, which seems to have been part of the composer's overall conception: but unless a DVD is issued with multi-angle choice of vision, then you're lumbered with seeing what the director decides is important, which isn't always what you want to see.

So, in brief, there's much less available material than you probably imagine, and the chances of fashioning a commercially viable RVW symphony cycle are probably zero. Sorry. 

 It is only a matter of weeks since I did an off-air video/DVD transfer of Shostakovitch's 6th and 9th symphonies, transmitted on 19 August 1995, to mark the twentieth anniversary of the composer's death.  Leonard Bernstein had conducted the VPO concert 'live' in 1988 at the Musikverein.   A treat, too, to see his eloquent illustrated introduction to the 9th.    Pre-digital, of course, but both sound and picture have been enhanced by transfer to DVD.  Not too much angst by 'Lenny' but his commitment was total.

Perhaps 'argued' is not quite the right word, but a pointer, at least. 

http://www.bbc.co.uk/dna/mbradio3/F7497566?thread=5572202&skip=0&show=20

(Page 2, message 38 in reply to Smin's message 37, which makes a single point on the subject which I considered worthy of expansion. Since TV and video directors tend to eschew long-shots of the entire ensemble, these very powerful moments of section unanimity tend to be lost: often the same problem arises in the polyrhythmic section of Le Sacre. As each new pulse arrives, the cameras concentrate solely upon its prime participants, thereby losing the visual counterpoint of the competing rhythms entirely.)

I'm afraid that, as the Member Barrett can confirm, 'witnessed' is only partially accurate in the case of the Member Now.

Would there be any "region" conflicts likely if purchased from that source?  I have a pile of things lined-up in my shopping basket to purchase sometime next week - easily enough to make the delivery cost worthwhile    What tax would there be - surely it's an EU country with no tariffs due (for delivery to UK, where I'll be)?  Or is that just naive Guardian-reader jabber?

Ta!  I shall give my current basketful the Amazon.Fr price-test, and see how much might be worth buying in euros!  But I'll wait until I reach Foggy Albion to do so...  the idea of an Englishman ordering from a French site from a Moscow IP-address, and then specifying London delivery, might send their cc fraud-protection into tailspin