Video index   Use a YouTube link location to watch a video on this page; paste it here then click “Play”:
If you just have a YouTube video ID, click YTprefix, then insert the ID and click Play.
Note: the ID is eleven characters using only the following 64 characters:
A to Z, Z, a to z, 0 to 9, underscore (_) and hyphen/minus (-).
If a still image for a video appears but clicking play   produces     try this: Play on YouTube page