I have a plain html5 export running on Kongregate right now.
Rex just made some plugs for newgrounds.
plugin-new-grounds-api-v3_t179642
The Gamejolt API v2 is still in the works, but yellowafterlife updated his plug in 2014 to handle most if not all of the api, including server storage.
I do believe he checks in occasionally, and has a fairly permanent web presence.
http://yal.cc/gamejolt-api-for-construct-2/
I would interject the option still remains that you can make a plug, or contract someone else to make a plug.
Surely the profits from your videos would pay for it.
Also let me say there are probably dozens of game portals that accept html5 games, and several of those also have C2 plugs.
Many of those also have more traffic, globally than Kongregate, and Newgrounds.