You are in a position where you need to update a video in your player, but want the YouTube link to be the same as before.
YouTube does not support replacing videos with the same URL. Hence, a video pushed to YouTube from Vidyard will get a new URL each time. This is due to YouTube being built around 'video' sharing pages as opposed to the 'player', and have unique URLs for each one.
That being said, if you anticipate changing/updating a video on YouTube after a certain period of time, you could push a Player to YouTube to create a YouTube Playlist. This would create a URL that can remain constant as you update and change your videos.
Playlists more closely replicate how a Vidyard Player Sharing Page functions. You can have more than one video shown per URL and replace the content when needed.
Each playlist has a URL that you can share with a unique 'list' query string. e.g.
You will see a video ID in this link (as v=). If that video gets removed, the playlist (and newer video) will still be accessible from the same link.