I haven’t seen this Ellen clip or other videos where it may be noticeable - but the man could just have had a cold or a bug - or was tired, or not feeling great?

Also, it’s worth to remembering that on some shows they have guests doing wacky stunts etc - and it’s edited around later, so if it’s not a live show that may be a reason they (anyone) would be a little out of breath.

If the man smokes so be it - it’s his life. Some of the world’s oldest people smoke - some professional athletes smoke - it’s up to them - and really is none of our business.

That said I wish him good health etc etc.