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Deos 3speak delete content after a while? This is our big concern!

It's unclear, actually. Having just trawled their FAQ it is not exactly stated. They claim a % of each post (rightly so) and I had understood as long as you keep posting, content stays up.

I KNOW dtube does not keep content, so don't use. And it's cumbersome. @3speak allows comment from non steem people, which I like.

So are you saying @travelfeed only supports posts which use youtube video???

As for embedding videos we only support @dtube and Youtube (as for now) but could be convinced to also support @3speak videos.