Lets leave the catalyst issue aside for now.
That video is misleading in many ways, however I dont begrudge Lubrizol the right to increase their revenues. The issue with FC-W is the claim to increased rust/corrosion prevention. Of course Marine engines are highly stressed, more so than automotive that goes without saying. Its is implied that only FC-W oil can meet those demands. That is just not true. Auto engines can also be stressed with stop & go driving, gravel roads, -30 Low temp start up, over due drain intervals. Marine engines dont usually have those conditions. Non FC-W oils also have corrosion inhibitors, but not enough for marine use? If that is true, why haven't all the marine engines rusted away that have not used these oils? Video shows a boat being towed in with engine failure supposedly because they did not use proper FC oil. In all my years of boating I have not seen a boat towed back from rusting engines, or corrosion failure. In all my years of going through marines service areas, I have never seen a rusted engine except one left outside in the elements in neglect.
For the past 100 years automotive oils have been fine, but now there no longer good enough? I will take a quality automotive or HDEO oil over a poor over priced FC-W oil any day. Many people here use a 15w40 or 5W40 HDEO in Marine engines and sleep well at night.