He definitely could, but I imagine his immediate goal is to manage expectations, and making sure no one is disappointed. Leaving it as he did, he's open to do

He definitely could, but I imagine his immediate goal is to manage expectations, and making sure no one is disappointed. Leaving it as he did, he's open to do anything he wants: upload monthly, upload in indeterminate times, never uploading again, etc. And no one will feel let down or deceived. If he said he'll start doing monthly, but then finds that he much prefers not doing the primary Tom Scott stuff at all, many people looking forward to those monthly videos will be let down. If there's one thing that I feel comfortable saying about Tom Scott (as a casual viewer, at least), is that he likes doing right by people. I doubt anyone, including he, knows what to expect will be next, and the best thing he can do for his audience is to set an expectation that there ought to be no expectations. Let any surprises be surprises for the better, and let him have the peace of mind that he can do what he wants without feeling external pressure to deliver.