hola no puedo bajar los videos m pone error de descarga no se q hacer

Hi,

Make sure you upgraded 4K Downloader to version 4.0.
If you did and that did not solve the problem, try doing the following:
Firstly, please check your firewall or antivirus settings, they may block the download sometimes, try to switch them off completely and download something.
Secondly, please reboot your computer completely and try to download again.