Thanks. The L-shaped ones are exactly like the one I have, the rest aren't better. I found on eBay more compact adapters from HDMI Micro (D) to normal HDMI, as well as HDMI male/male, but not male/female. It's a conspiracy.
Sorry, but I'm sure you too have never seen an HDMI "Record IN" jack
Err - I'm sitting looking at one now. My BlackMagic Ultrastudio Express has both HDMI and HD-SDI inputs for recording, and outputs for replay.
It's a common requirement to be able to record the HDMI output from cameras and camcorders - particularly those which don't have HD-SDI outputs. The popular Convergent Nanoflash (which arguably created the sector) and current Odyssey 7 both have HDMI inputs as well. People use external HDMI recorders to record at higher quality (say ProRes or DNXHD) than the internal recorders of some cameras which may use poorer quality codecs like AVCHD. This can often allow you to record 4:2:2 rather than 4:2:0, or to record at higher resolution.
For example, the current Sony A7s is a 4K camera which has stellar low-light performance, and will output a 4K 4:2:2 signal, but will only record 1080p internally. There are plenty of reasons to have HDMI "Record In" jacks...
And the other widespread use for HDMI "Record In" is to allow gamers to record their gameplay.
(Of course this has nothing to do with HDCP - as the cameras and camcorders have HDMI outputs without HDCP)