There’s a really interesting website called in2worlds that goes deeply into the whole hyper dimensional/ aliens thing. The woman who wrote it all has a theory that some alien abductions are actually military operations. I haven’t checked the site for a while, and honestly it does sound batshit in places, but it is fascinating.
Although she does some podcast interviews she’s quite low-key.
It’s kind of a mash up of aliens, spiritual stuff and the hyper dimensional world. I do like the fact that she doesn’t make definitive pronouncements on anything though - it’s much more “here is the weird shit I and my family have experienced, here are some theories, but ultimately who knows”.
Some of you may like it.