Need More Information on Adding Media to Epub

[frastlin]

Hello,
The Graphics and Multimedia Page
Is missing exactly how to add media in an Epub. Here are the use cases that should be covered:

1. Adding video and audio internally
2. Adding Video and audio externally
3. Adding video from youtube and Vimeo
4. A link to Epub creators that support multimedia content
5. A link to Epub readers that support media in Epub.

Some Resources

I've been looking around the internet for the answer to these five questions and here are some things I have found:

Adding Video and Audio Internally

Here is an amazing article that pretty much says everything one needs to know about adding video and audio internally.

Adding Video and Audio Externally

I can't find much on this topic specifically.

Adding video from youtube and Vimeo

There are a lot of conflicting methods on how to do this:
One blog and an Indesign Course state that all one needs to do is copy the embed link from the Youtube share area and paste that into your document.
This is probably true, but I would like someone who knows the Epub3 spec to verify this is the case, as none of my Epub readers seem to work with the above method.
Another post from 2013 says the Youtube embed option doesn't work, and instead one needs to get the ID of the video and put it into a Flash frame.
Neither of these options are using the video tag, so how does that change support?

A link to Epub creators that support multimedia content

There is already a page from the DAISY Consortium

A link to Epub readers that support media in Epub

There is a site that does this already but it is out of date and there are no tabulated conclusions, like the most accessible feature rich application.

[jobara]

@frastlin thanks for the feedback and resources. Would you be interested in Pull Request to update the resources?

[jhung]

@jobara and @frastlin, thanks for bringing this to my attention. There was just a discussion offline about updating this resource in the early 2019, which may also include some of the work we have been doing with EPUB as an OER content delivery format. We don't have an exact timeline just yet, but it is on our radar.

[frastlin]

I can do some documentation, but I was hoping my research was wrong and support was better. As it stands, no accessible Epub player can play Youtube videos.
Caliber, the most robust of all the Epub solutions is not accessible with a screen reader.
So for all intents and purposes, the screen-reader accessible Epub readers can not handle the newer Epub content.
The only reader I found to play any kind of video was Edge and there are other problems with Edge that make it less than ideal.