UPDATE - 2/24@12:42PM: Reader e2 mentions in the comments that he purchased the film on iTunes on January 3rd, so it's been available since at least then. iTunes only has the release date listed as 2013, so it's not clear when exactly it was released.
Rush's Clockwork Angels Tour CD/DVD/Blu-ray was released back on November 19th, debuting at #1 on the Billboard Video charts, with the CD debuting at #33 on the Billboard 200 Album Chart. The film had a one-night theatrical premiere across North America the night before its release, and a TV premiere on VH1 Classic and Palladia back on December 1st. When it was initially released, the CD was made available via iTunes, but not the concert video. However, reader Andrew G pointed out that the film version is now also available for purchase on iTunes Movies for $15.99 at this location (it's not clear exactly when it was made available). You can see the official trailer for the film here and order your copy at this location (DVD, Blu-ray, CD).
[Rush Clockwork Angels Tour television premiere tonight]
[Rush's Clockwork Angels Tour video debuts at #1 on Billboard Video Chart, #33 on Billboard 200 Album Chart]
[Clockwork Angels Tour concert film to get TV premiere on VH1 Classic Sunday, December 1st]
[Rush Clockwork Angels Tour CD/DVD/Blu-ray/theatrical release open thread]
[Preview of Rush's Family Goy parody from the Clockwork Angels Tour DVD/Blu-ray]
[Rush Clockwork Angels Tour limited edition deluxe package]