ok, I see, I have been confused by the method DownloadToASD.AppSpecificDirectory
which does not download anything, it just returns the path to the ASD (Application specific directory)..
you are downloading the file to the ASD, but in your latest screenshot you do not set the correct path to the downloaded file (your large blue arrow).... use again the method DownloadToASD.AppSpecificDirectory together with your file name, as already mentioned earlier it must be a relative path for the video player component...
also it would help you very much to use Do it to debug your blocks to find out, if the path is correct...
see also tip 4 here https://puravidaapps.com/learn.php
see also Live Development, Testing, and Debugging Tools
Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by Taifun.