A common, but incorrect assessment. There's also no video here.
I too have played COD since COD1 and was a fan until BO1 when I effectively joined Activision. The system works and has improved over every title, but investigations take time because the goal is to make the right decision. The process of investigations through a queue becomes lost on those who browse any forum and see a blatant violation of our policies/terms. The swift answer to that is that if they have been reported, then they are in the queue and will receive an investigation. Any additional forwarding on my part is a simple courtesy to move the evidence straight to the team. As I have stated here and before, commentary on an investigation to action is a fair criticism but does not render reporting ineffective.
Reporting in-game is a default action one should always take if any policy/term violations are suspected or alleged. We have banned far more players through in-game reporting and routine enforcement than any sum of reports I or our team have received across Reddit, our studio's Twitter accounts, or ATVIAssist's Twitter account.
As for this service you appear to be providing other players, it is best for these players to both report in-game and share their additional evidence here themselves. Should I need to follow-up with any player, I would prefer to do so with that player and not a third party.
I appreciate those who want to create fair matches for all players, but I too have no choice but to share the above.