Could be any or all of below or some other reasons
Rushing for the train (kept on focusing on the train)
Old already (mind not sharp)
Not familiar with the station
Mentally tired eg depression
Maybe eyesight not good

1. Mind not sharp doesn’t mean retarded can not take flight.
2. Not familiar means he is distracted and did not notice the gap.
3. Not sure what is your point.
4. If you think the way he walked is blind.
    Ok. Up to you. Now I know how good you are
    with your analysis. Let’s wait and see if there is any
    report that he is blind.

No problem if you think he is blind.  That is your analysis. I already listed my opinion. You don’t have to agree with me.

I don’t think blind people will walk like that. But you think he is blind. Ok. I’ll let others to judge your analysis.

Just by looking at the video on the person’s posture and actions you came to the obvious conclusion he is blind?
The guy in the video looks like a blind person?

If he is blind he probably won’t fall into the tracks because he will be constantly checking for uneven ground.

You’re not answering the question.
By looking at the video he looks blind to you? Yes or no?

Before this you kept on saying he is blind and kept on giving reasons he is blind. Now you say he is not blind.
Ok. Since we agree he is not blind then we can close this conversation.