Use existing player on video change

You're currently destroying the player and calling createPlayer every time the video id (or url/play list) is being changed. I think YouTube just updated their API's to stop this as my site started breaking.

Not sure if there are other use cases that might break this, but my current work around is to modify your loadPlayer function to check if the player exists, and instead of creating a new one, use player.loadVideoById to update the id. There are similar calls for load by url and for playlists.

src: https://developers.google.com/youtube/iframe_api_reference#loadVideoById

Start with the loadPlayer function mentioned in the issue and review how video IDs, URLs, and playlists currently trigger player creation. Read the YouTube IFrame API loadVideoById documentation and its corresponding URL and playlist loading calls; done means existing players update media without being destroyed and recreated when the video changes.

Written by the indexing model from the issue text.