I got an issue with Quill's setContent method. Everything works fine when I save the content but when I try to load it the attributes of my video/iframe tag are not being added. Do you have any idea why? (for images it works fine).
That is how I load the content:
quill.setContents(content, 'api');
And that is the output (as you can see, the image has the attributes, the iFrame does not)

FYI: I'm using this to resize the embeded videos: https://github.com/joaohenriiquee/quill-video-resize-module