ScreenTweet allows you to take most any video type and send it as a tweet link. Videos, screenshots, photos and images is what you would expect. But they also mention YouTube, Hulu and IgniteCast.
Before signing in, there is a public feed showing you the most recent postings using the service so you get an idea of what everyone is sharing. You can retweet any video type you are looking at and they follow the Hulu style letting you dim the lights around the video so it stands out.
Shortcut URLS are done with scr.tw and can be shared socially from the right side. Comments on each one can also be preformed on the site.
Keep in mind when logging in that there is a small checkbox that makes you automatically follow ScreenTweet. While it is not required, it is on by default.
So while they do not use oAuth, I logged in with a test account and was greeted with a clean screen allowing me to upload anything to 5MB, send a MMS from a mobile device to a special email address they create on the fly or paste in embed code from most of the media sites.
Your profile information is brought in and shows on the right side and you also get the ability to see your feed as well as reply feeds now in the upper menu, instead of just the public feed. The reply feed only shows replies on the ScreenTweet site, not Twitter replies.
Had I not checked the terms of service I forgot to check the settings area. It allows you to change the email address you use for sending in MMS messages. Mobile uploads can be disabled. Now the terms of service mentioned the ability to control privacy on postings, but I did not find that setting anywhere.
Otherwise it is a clean site that functioned easily. For being new the features worked well and had a lot to offer out of the box.