Your question had nothing to do with DPS so I've branched it off and moved it to InDesign EPUB forum.
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Thanks, didn't see this thread. It answered my question! It's a bummer, because I like the open nature of ePub (I can just e-mail it or host it) but want to keep the file size small by only having the videos stream from youtube.
Sorry Bill Bridgeforth,
iBooks had broken off the support for the embedded html items let it be maps, videos.
So whatever video you are placing is going there with the exported file but the reader(iBooks & Adobe Digital Editions) are not able to support it.
If you want to check you can verify it on Readium, an extension of chrome for epubs. or you can see on sigil.
As of now there's no way you can see them in ibooks
has any previous version of ibooks supported with embed feature?
I am not sure of which version supported it last in case of ibooks. BUt yeah iOS8 is not supporting at current point in time. But yeah, ADE has this working in 3.0.
Whatever may be the case i would recommend to stay on ADE4.0. Unless it's of very high priority.