I used slidego.com to covert a power point to html5 and then embedded that. Might be a workaround. Example here:
http://stephenteacher.tiddlyspot.com/#Unit%205%20P1%20Worked%20Example -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to tiddlywiki+unsubscr...@googlegroups.com. To post to this group, send email to tiddlywiki@googlegroups.com. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/e6fec6f2-ec19-4c55-9ff3-c094ae111c8f%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
