I can download a YouTube video using the Web tab, but once inserted into the schedule, the video is unresponsive; had to open Chrome, find the video, drag the window from screen to middle screen (the projector), find the mouse on the screen at the front of the church, move the window to the center of the screen, again find the mouse, click the play button, then reverse the procedure to regain the EW output, all the while the congregation gets to see me making this sausage. Gotta be a better way. I have 6.1.9.

What video format is the downloaded video in?
If it is an mp4 file, you just need to install quicktime support from the help menu.

EW6 doesn't download YouTube videos only links to them. You have to manually (mouse click) start the playback.