Embedding

I want to show a YouTube video just like the Blot introduction video.

How can I link images from social media, say, Instagram for example without the caption or borderline showing in a post.

Lots of times I write about org-mode and want to mention .org filenames, but if I write filename.org in a Markdown post, that filename will turn into a hyperlink, which I want to prevent. I found someone on Stack Overflow asking a similar question, and the workaround is to use a non-breaking zero-width space, like in the attached image, where I wrapped it in a code tag to get it monospaced. It does work with Blot, but is that the best way? Thanks! (Oops. I forgot to attach an image and now I don’t think I can.)

I have a Blot site that operates my blog on a custom apex domain, and a second Blot site for photos at a subdomain of the same address. (This is because I have a fork of the Blog theme for the former, but prefer the Portfolio theme for the latter.) If I sometimes want to include photographs inline on the blog, is it OK to reference the files at their URLs on the subdomain? If that’s going to cross wires for Blot, I’ll upload a second copy to the blog’s folder.