Saving aspect ratio

[fain182]

When you have UGC, you cannot know in advance the aspect ratio of a video, but setting it late leads to a poor user experience. Perhaps we could save the aspect ratio along with other video data, as we do with the poster image or blurhash?

[luwes]

It has crossed our minds before. If the video provider / processor returns this info it's probably a good idea to add this by default.

Getting this from the video source is possible but it requires something like ffmpeg which we decided not add for the time being. Previous PR #61