Error (403) when using direct link

[AYP-BOT]

Dear Experts,

I'd like to get a direct link to my video file (.mp4) that I uploaded to Dropbox to be used with the LINE Application Imagemap launched using JSON code, POSTMAN. The video does not play on LINE, and when I enter the link into my browser, I get the Error (403) message It seems you don't belong here! You should probably sign in. Check out our Help Center and forums for help, or head back to home.

How can I solve it? Give me suggestions.

Thank you in advance.

[Здравко]

Hi @AYP-BOT,

Such a message shows that you have destroyed your link somehow. How exactly you transformed it to direct link? Seems like mandatory link parameter 'rlkey' is removed while only 'dl' parameter has to change.

Hope this helps.

[AYP-BOT]

Dear Здравко,

Thank you for your message.

I transformed the link by deleting all characters behind the file extension (.mp4) and then changed the www. to dl. 

I got this method from Youtube's video clip. That tutorial worked fine but not for me even I copied every single step.