Upscaling DVDs to 1080i (or 1080p on later than first gen players) was a feature on all Toshiba HD-DVD players afaik, but it was only available through HDMI. With analog outputs you were limited to 480/576p at best. This is true to most, if not all, Blu-Ray players as well with analog video outputs.

Most, if not all, HD-DVD players have ethernet capabilites. USB input is also common.

Being able to tell which players that can bitstream Dolby TrueHD and DTS-HD MA and HR would also be great.
And also sorting what players that use HDMI 1.2 or 1.3 as this can be a real headache when trying to use these old players on modern systems.

As for YPbPr, it looks a bit confusing as both options are entitled identically yet have different images. And YUV should not be confused with RGB neither. It would make more sense to separate them by calling them "Component analog video YPbPr (BNC)" and "Component analog video YPbPr RCA" respectively. YCbCr can only be output through HDMI on HD-DVD players due to HDCP so having that option doesn't really make any sense.

Should I split HDMI IN+OUT into HDMI 1.2 or 1.3 or 1.4 IN+OUT?
We'll just assume HDMI 2.0 is equivalent to 4K for most people.

I have yet to find a YUV output that is not RGB compatible or a RGB that is not YUV compatible, some older devices couldn't do both?

Which part is not clear between BNC/RCA pictures and YPbPr/YCbCr descriptions?

YCbCr gets a bit odd however since that signal is never transmitted through RCA. It's used primarily with HDMI and SDI (which has BNC), as well as DisplayPort and DVI but nowhere near as common.

I personally think it's a good idea to specify the HDMI versions both for inputs and outputs.

I'll second that noting which players can bitstream TrueHD and DTS-HD Master is a worthwhile addition. I'm pretty sure it was limited to the XA2, A35, and their clones.

As mentioned the player does decode 5.1-channel Dolby Digital Plus and TrueHD, and outputs these signals as multichannel PCM over HDMI. It does not decode DTS-HD Master Audio, which has almost no presence on HD DVD anyway, nor does it transmit either format as native bitstreams over its HDMI 1.3 output. It also lacks multichannal analog outputs, so for high-res audio it's HDMI or bust.

I know a number of you are probably scratching your heads, and wondering if I really meant to write that this player's HDMI 1.3 output can't transmit TrueHD and DTS-HD MA as native bitstreams. It's true. TrueHD and DTS-HD MA are optional in the HDMI 1.3 spec, and my understanding is that source component manufacturers can choose HDMI transmitter chips with or without hardware level support for bitstream transmission of these codecs, and that even with a transmitter that is hardware capable the player's firmware must also support bitstream transmission. I don't know what the case is here, but as of now bitstream support isn't enabled here, and as with other next-gen player manufacturers, Toshiba only makes this feature available in a more expensive model.

Apparently, it comes down to whether the HDMI transmitter chip used in the specific model supports bitstream output or not.

Submitted update for the Onkyo HD-805.