This isn't a bug, oembed cards are generated when the data is provided. A year and a bit ago youtube chose to require multiple different methods in order for a user to be verified as legitimate and not a "bot" such as javascript, requiring a user token etc. They actively block datacenter IP address ranges. Sometimes when they break it, youtu.be links will show a thumbnail and description but it's once in every few months.
In order to resolve that club would have to have a pool of residential proxies rotating regularly or somebody would have to create an account and provide tokens and a shim would have to be written specifically for youtube links in order for them to embed in any capacity, unfortunately
edit: replied to the wrong reply, woops
