private void MenuItemDownloadResolution_Click(object sender, EventArgs e)
{
ToolStripMenuItem t = (ToolStripMenuItem)(sender);
string[] infos = t.Text.Split(' ');
int res = int.Parse(infos[0]);
int index = listResults.FocusedItem.Index;
VideoItem video = results[index];
openNewDownloadForm(video.getYouTubeVideoWithResAndExt(res, infos[1]), results[index].url);
}