Just don't keep us waiting too long! 
Right now I'm working heavily on the video playback support. I decided that I want all player lines to be able to play a video file just as though it were an MP3 or Karaoke file (rather than a separate video player). I don't want to release the program one way, then later change it... so I'm working on a solution.
Each player line (including the Playlist player) will play any type of file. The "preview" window (that always shows Karaoke) will always reflect what is on the main screen (currently there are two separate "preview" windows, one for video and one for Karaoke, and it may not always be clear which one is actually being shown on the second monitor -- especially in cases where the actual physical monitor may not be in clear view of the DJ/KJ).
So instead there will always be the one preview window (with two size options) so you always know what's going "out". When you "preview" a line, just like before, it will play the sound through the headphones (second audio device). It will also show a rather small preview of any karaoke or Video *on that player line*. Only when you "unmute" that line will it go over the main monitor.
The tiny line preview will take over the area where the filename is shown, much like when you use the per-line EQ.
Okay, I've made a mock-up of what I'm talking about. Note on the left is a karaoke file being played in line 4 (farthest right player showing the EQ). That is what would be also on the external monitor. Next to that line, #3, is a video file being previewed. Note the headphone icon and the mute are both engaged. I suppose I could have picked a better frame to grab but when you see the video in motion, even that small it's enough to know it's what you want for previewing purposes. Once "Mute" is turned off, or playback stops, that little video preview disappears showing the filename etc again.
So basically, this will all be about the same as the 7.x versions, except that:
- Player lines can play Video files as well as Audio and Karaoke
- The "Karaoke Queue" is now on the left with font-size options
- The Playlist Line is reworked quite a bit, also with larger list and font-size options
I think the Karaoke Preview will *always* be shown, regardless of which "tab" you're on over there... still working out all the details at this point but it's getting better.
Also I *may* be able to manipulate the audio stream directly, so videos will go through the same EQ/Mixer/AGC as everything else, and will show in the VU meters. Plus, I can (possible...) crossfade video to audio, or even video to video...
As for the CODECs, so far I'm able to support most files I run across. There are still a few that are troublesome but most MP4/MOV/FLV/MKV files (all some form of MPEG-4) are working now, as well as all of the older formats of course. I tried to support Flash video however that requires licensing from Adobe (think $$$$$$$$)... and all the rest of the formats are either open source, public domain, bundled with Windows, or otherwise freely available to use without licensing restrictions (that applies to the FORMAT, not the content of the video of course... keep that in mind when using in public)...
PS - don't mind the red background. I'm working on the "skin" or "theme" feature, and I think I really want to do that because it's fun to change the colors around every now and then so you don't get bored staring at the same thing all day every day

PPS - Something is wrong when the forums won't accept a JPEG for "security concerns" but PNG of the same thing is fine... I didn't write the forum code, it's a third-party thing, so I'll have to look into that... or just turn off the "security checks" since I don't allow executable filenames anyway...