Did you try embedding it via twitframe.com as outlined in Amy's reply just before you? Also: When attempting to include <iframe> keep in mind that your community user needs to have full HTML permissions as otherwise part of it could be stripped out again on posting.
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Thanks @spenumaka that does seem to work in theory, but we still get an error message with our vids. Must be some Facebook setting or something. spenumaka wrote: We normally use iframe to embed in a post. That seems to work well.
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