What I mean is, I can go to 4chan or Warthunder forums and embed a Youtube video and watch it on those sites. Could you do that with a gaming console? I am making a game and would like this kind of functionality. I don't want to invent it but I would certainly use it if it was a service or free as part of the W3C standards as my game would be in HTML5.
My goal if possible is to make it so that you could play on forums and blogs or whatever and not necessarily directly on the game's site.
Many games include WebKit that works like a browser inside the game.
Just beware that since it is a full browser with support for all the browser support, it requires significant resources on its own.
Since the original question was edited, my earlier answer doesn't fit the edited question. The updated parent post appears that you want to build a HTML5 game you can embed on another site's content, not create a game that additionally views web content.
While you can use an iframe or custom media tag to load a game on a site you don't control, I don't think it is a good idea for an intentional design.
First, you're basically asking for content thieves to embed links everywhere. Much like the concerns over people who would steal and reuse flash items, you're likely giving away the farm so anyone anywhere can use your content and you get nothing in return. YouTube mostly does okay with this by heavily branding the screen before and after playback, plus branding when the mouse is over it by showing a scroll bar with YouTube on it, even with that some people write their own code to un-brand or re-brand away from YouTube. Some HTML5 games are already suffering this fate where the game part is loaded as a frame in a game aggregator site. The players don't know you exist, the game aggregator gets the ad revenue, and you pay the bills for server bandwidth.
Additionally you're opening the door to cross site scripting issues and web attacks. While generally the security model limits communication between windows and frames to content from the same domain, there are many known exploits. Many script-blocking tools will block iframes under assorted circumstances, both because of annoying ads and because of potential security hazards.
And knowing 4chan, building a game so it can be embedded into 4chan seems like a really bad idea. Mostly just "because 4chan".
Additionally you're opening the door to cross site scripting issues and web attacks.
To frob's point, I do not really see much of an issue with direct theivery or cross-scripting exposure with this, but then I am not fully familiar with what the W3C considers "OK" when it comes to something like an <embed> or <iframe>.
hplus0603 is close to what I was going for, I failed to point out that the game would be login required and all assets would sit on a server I solely have an account for. I thought something like a Youtube embed was nothing more than a screen or portal to the actual site, that is what I was going for.
I think the closest possible example would be Gametap, where they have all the games on their servers and emulate them to where you play through your monitor but never actually download the game directly. Playthrough streaming? I do not know, but I am surprised no one else has really tried this even with the risk as far as I knowl.
