If I embed a video in a post, what shows in the corresponding email is an empty outlined placeholder-like block where the video is meant to be. Is this expected behaviour?
In a Substack email, there is a screenshot or animated GIF clip of the video in that spot, which is better than an empty placeholder.
Are you using the Video card or embedding a 3rd party video?
If you’re using the Video card, which browser are you using and do you get any errors in the developer tools console when uploading a video?
Which email client are you using?
For the native video card the editor should be capturing a screenshot automatically as part of adding the video, which should then be used when sending an email. If that’s not happening, something is going wrong somewhere along the line.
Yeah, that won’t work in emails. HTML cards render their contents exactly as entered for both the website and email, however video embeds like the type you can copy/paste into a HML card typically work by using javascript which is not supported in emails.
If you want email-friendly video embeds you’ll need to use the native Video card or an Embed card with a service that provides thumbnails as part of the embed metadata (e.g. YouTube or Vimeo).