What's on https://blog.openhive.network is pre-release version of new code designed for Hive.Blog, should be safe to use with Keychain and it also has its own authentication based on "beekeeper".

iframes and any other non-markdown content within body of blog posts or comments are not recommended. I mean, decentralized platform so I should rather say - I wouldn't recommend them :-)

As for videos I have high hopes for 3Speak / SpkNetwork and their pursue of decentralized storage that we could easily use (and self-host).