Very thorough review. But just a few points-
1). at 8:29 of the video the Sandbox settings was highlighted, specifically the setting that only isolates threats from the Internet. If the setting is left that way (default), ONLY items that are run from the C-Downloads directory will be sandboxed! God alone knows why Comodo decided to do this- malware run from anywhere else will not be virtualized and will infect the system. Changing that setting from "Internet" to "Any" will sandbox malware (and adware/Junkware) run from ANY location (This was demonstrated quite well at 43:18).
So it is IMPERATIVE to change that sandbox setting from "Internet" to "All".
2). I'm really curious as to why there were trojans in the Temp directory (at 27:48). When downloading a malicious file into the Downloads directory and run, everything that happens subsequently will be in Full V and will at the most (in the case of spawn) will go into a virtual temp directory which will be flushed when sandbox is cleared. As a scan wasn't done prior to the test, there is a great likelihood that they pre-existed in that directory.
3) An easy way to directly see what is being sandboxed is in Killswitch Click View>Show Only Sandboxed processes.
4). Comodo AV, never really very strong at its best, is now awful against new malware. There is no reason at all to install CIS (with the local AV) over Comodo firewall (without the local AV).
5). I feel the major difference between version 8 and 7 is that the sandbox at Full V is now the default level. This is excellent (or would be if not for that stupid "Internet" setting!).
6). Thank you very much for posting this review!!!!