You might find the following useful : Visual Understanding Environment - https://vue.tufts.edu/ Came across this in another thread recently - https://quarto.org/. - Source: Hacker News / 6 months ago

I use this for drawing "graphs" in the formal math sense like you're looking for: https://vue.tufts.edu/. Source: about 2 years ago

There are a number of free and commercial softwares developed for diagrams, flowcharts, and mind mapping with similar features. I haven't used them in a while, but in the past I've liked yEd and VUE. Both are free and support multiple platforms. Source: over 2 years ago

The site is working for me ( https://vue.tufts.edu ) as is the download, so it was probably a temporary glitch. Source: almost 3 years ago

I think your best bet may be Visual Understanding Environment (VUE). I can't say for sure if it will store or play videos but they make a big deal about "digital media" on their website. Source: about 3 years ago

Not OP, but have a look at [0]. It’s not great, but good enough. I regularly use it for App Store screenshots with captions and text. [0] https://theapplaunchpad.com/. - Source: Hacker News / about 1 year ago

For an advanced approach that includes localizations of your text and a ton of included resources to build your designs off of, there is AppLaunchPad (which has both a screenshot version and a mockup version with free and pay-by-the-month options), there is Vernissage which has a free and a pretty cheap pro version, and then there's App-Mockup which is free web-app. Source: almost 2 years ago

I used this. Paid for one month and got a good use out of it. https://theapplaunchpad.com. Source: over 2 years ago

I used AppLaunchPad. It’s a paid service but you can go monthly for single months when you need it (US$ 29). And you can easily wrap device frames for different size and colors of iPhone and iPad around the standard screenshots that you supply. Source: almost 3 years ago