i made a simple code, but i have a problem and i don't know what to do..
everything work, the programs is running and all but when i click 'Download'
it's write this message:

"The remote server returned an error: (404) Not Found"

this is the source code:

If you put the URL that you create into a web browser and try to view it you get "We're sorry, the page you requested cannot be found."
So you aren't creating the URL properly.

try to put any url that you want, every video, it's just not download it.
can you try to fix my code please?

thanks.

the url should be something like videoplayback? blah blah blah but youtube has changed their api again which i havent figured out the new api just yet

yes me too :/ thanks againg, if someone knows it please send me a message thanks.