I've come across a bug on a clients site. All the youtube embeds in their new posts are now set at width="200" and height="113", however some of the older posts have videos embedded at width="612" by height="344".

Has something changed in the Ghost codebase that now sets the embeds at this size? I have tried to copy the old posts videos into the new posts, just incase there is an issue with the youtube video. However it still sets it at the smaller size.