AFAIK it's possible to use $$ -- $$ for math notation, it exports to LaTeX/MathJax etc, and there's a setting for making it to preview within the buffer (the f

AFAIK it's possible to use $$ -- $$ for math notation, it exports to LaTeX/MathJax etc, and there's a setting for making it to preview within the buffer (the function is "org-latex-preview-fragment"). And there is very good latex integration, support for latex blocks etc. I do not know the details tho, I'm not a maths guy. If you set #+OPTIONS: inlineimages you'll see links to local images inline in the buffer. IDK, if video is possible, but I think no.