The video is at the link. Trump said "...he didn't have the courage..." Where is that different from saying he was a coward?
I think those terms have very different connotations.
I think courage and bravery are two different things, but are often treated as if they mean the same thing.
Like cowardice and fear. Some people treat them the same, but they aren’t. Many people have great fear, but do what needs doing in spite of it. Cowardice is the inability or unwillingness to perform a task due to fear
To say someone lacks courage is one thing. To say someone is a coward is something else.
Just my opinion.