Can you please point out the timestamp when Trump attempted to clarify?
The closest I found was at ~31:00, some reporter asks for confirmation that there's no scenario in which disinfectants would be injected into the body. Bryan declines to comment, Trump responds with "maybe it works, maybe it doesn't work," which doesn't really provide any clarity.
And then at ~50:00 he asks Bryan to "talk to the medical doctors" to look at applying light and heat as a cure. Then he says "maybe it works, maybe it doesn't. I'm not a doctor, but I am a person with a very good you-know-what."
Some reporter suggests that the President of the United States should not spout random stuff and say "maybe it works, maybe it doesn't", Trump responds with "I'm the president, and you're fake news."
It's not just a matter of not liking Trump. I don't like Vladimir Putin or Xi Jinping, but they're not fools or clowns.
That didn't prevent the rabid anti-Trump media from making it a headline on every site, of course. Which then becomes:
"Trump says inject Lysol!"