Like I said in a previous comment. This already works on steempeak, just not on steemit.com. If a website wants to embed 3Speak websites they are free to do so by using the already existing embeddable video player.
check it here: https://steempeak.com/@exyle
I'm reading this on steempeak and clicking video directs me to 3speak.com
All the videos in 3speak could be ember in twitter just by sharing the link. You can embed them in your website just by clicking under the video the button share and use that link. And they could be ember in forums if the forum accept the code. From steempeak, I'm able to watch and I think steemit will add that option in the future.