The image appears suspending inside the block of glass and responds sufficiently well to head movements to be convincing. You can't see the giveaway "ruled lines" that lentincular sheets have.
Once you know it's not truly holographic it becomes fairly obvious and you notice that up/down doesn't provide any depth (only left/right) but the effect is convincing and magical at first.
So although it might be lenticular in principle - it's far from what you could achieve with your proposed method.
I can understand how this might really look a bit better, now, with the clarity on the left/right vs up/down depth (I recall reading something about depth perception that makes this less important, but I don't recall where/when), so it's sounding promising.
[0] I'm not saying it doesn't -- this is just based simply on the fact that I have yet to see one that does (and, in fact, if this isn't the technology I think it is, I haven't seen one at all).
Mom: We have Dropbox at home
Dropbox at home: ftp + curlftpfs + svn
But I'm "that Dad". For home-related projects, about 25% of the stuff I replace with "home-built" ends up being the things my kids show off to their friends[0]. The other half is duct-tape and rubber bands. Unfortunately, the duct tape exists in the worst places -- like DHCP, and my routers, so while they don't require extra effort to use, they flake out on some of their devices[1].
My favorite is when I have to be called over to explain that, no, Son is not lying us doing that ourselves. He used to walk into his room and hit a few keys on the remote, which would trigger Plex to play a song, dim the regular lights and enable some really slick music visualizations. Hit pause/quit the app and the room goes back to previous state. If his phone started ringing, the app would auto-pause[2] and play-back after the phone returned to idle state.
[0] It goes something like: "Son: Can I buy this (overpriced) LED/gaming PC thing?" and usually ends with me saying "... or, we can buy $10 worth of things I don't already have and make something that when you're friends as 'where can I buy that', you can say 'You can't, but I sell them for (overpriced) if you want to buy one!'". .
[1] Recently better -- ESP8266 devices and Android devices didn't play well with one of my DD-WRT based routers.
[2] Home Assistant and Android allowed me to read phone state. It worked but there was horrible delay and after a phone update, it just broke entirely, causing it to interrupt playback constantly. I ended up wiping out every related piece of that automation with the intent of doing it right (with a bluetooth sensor in his room which would allow me to trigger actions when he arrives/exits the room) but haven't completed that, yet.
