I also watch BrickImmortar. Maritime Horrors and Part-Time Explorer are other good ones that follow the same trend, with Maritime actually working on a ship on the Great Lakes, so there is a lot of "Speaking from experience" presentation when he is going over shipping accidents.
As for other channels that fit your criteria:
Drachinifel: Keeping with the naval theme, he covers naval history from the Age of Sail up through the end of World War 2 (with some limited outside those time periods). His main thing is he is an engineer by trade, so he goes into the engineering behind warships and why they were designed the way they were. To that end, he is well known for having a massive hate boner for the Bismarck-class as being overly engineered and inefficient (him showing it to be less useful than even ships older than it), but also giving ideas on how it could have been improved in a separate video. He also has an in depth, 3 part documentary on the Battle of Jutland, and a running theme of having his April Fools episode being the covering of a ship in his usual style but one that doesnt exist or wasnt used in that role (his most recent being taking the SS Great Eastern and roleplaying as if the Royal Navy actually went through with buying it like had been considered in the 1850's).
CallMeEzekiel: A history channel covering all of the usual world history stuff, but using the Polandball characters to represent everyone. He also typically goes into more detail about things for why certain events happened or why certain groups believed what they did. Also has several episodes covering China from the Opium Wars up to the Boxer Rebellion, which is a time period that gets overlooked sometimes in world history.
Captain Slicerax: A currently small but fast growing channel. He does play video games with a Vtuber model (mostly War Thunder), but his day job is as an aerospace engineer. So he also uses the channel to talk about the history and designs of various military aircraft. He recently completed a 4 part series on the history of the F-4 Phantom, but he has covered both Soviet aircraft (usually dunking on their bad designs, or lamenting them as good designs but too late to matter like with the MiG-29) and has started covering some of the newer American aircraft (which is usually giving them high praise). He does admittedly have a hardcore pro-US, anti-Communist bias, but I doubt many here will care about that too much.
Stiff Lip Supplements: Lets be entirely blunt and up-front here. This channel is literally the advertisement arm of the company of the same name founded by some veterans that makes caffeine pouches you can put in your lip like tobacco dip to both kick a tobacco addition and/or get caffeine without shaker cup mixes. But even if you dont get their product, the videos they use to advertise are funny in their own right and make fun of stereotypes about the military and the different MOS's. So it is fun in its own right to me.
I also watch BrickImmortar. Maritime Horrors and Part-Time Explorer are other good ones that follow the same trend, with Maritime actually working on a ship on the Great Lakes, so there is a lot of "Speaking from experience" presentation when he is going over shipping accidents.
As for other channels that fit your criteria:
Drachinifel: Keeping with the naval theme, he covers naval history from the Age of Sail up through the end of World War 2 (with some limited outside those time periods). His main thing is he is an engineer by trade, so he goes into the engineering behind warships and why they were designed the way they were. To that end, he is well known for having a massive hate boner for the Bismarck-class as being overly engineered and inefficient (him showing it to be less useful than even ships older than it), but also giving ideas on how it could have been improved in a separate video. He also has an in depth, 3 part documentary on the Battle of Jutland, and a running theme of having his April Fools episode being the covering of a ship in his usual style but one that doesnt exist or wasnt used in that role (his most recent being taking the SS Great Eastern and roleplaying as if the Royal Navy actually went through with buying it like had been considered in the 1850's).
CallMeEzekiel: A history channel covering all of the usual world history stuff, but using the Polandball characters to represent everyone. He also typically goes into more detail about things for why certain events happened or why certain groups believed what they did. Also has several episodes covering China from the Opium Wars up to the Boxer Rebellion, which is a time period that gets overlooked sometimes in world history.
Captain Slicerax: A currently small but fast growing channel. He does play video games with a Vtuber model (mostly War Thunder), but his day job is as an aerospace engineer. So he also uses the channel to talk about the history and designs of various military aircraft. He recently completed a 4 part series on the history of the F-4 Phantom, but he has covered both Soviet aircraft (usually dunking on their bad designs, or lamenting them as good designs but too late to matter like with the MiG-29) and has started covering some of the newer American aircraft (which is usually giving them high praise). He does admittedly have a hardcore pro-US, anti-Communist bias, but I doubt many here will care about that too much.
Stiff Lip Supplements: Lets be entirely blunt and up-front here. This channel is literally the advertisement arm of the company of the same name founded by some veterans that makes caffeine pouches you can put in your lip like tobacco dip to both kick a tobacco addition and/or get caffeine without shaker cup mixes. But even if you dont get their product, the videos they use to advertise are funny in their own right and make fun of stereotypes about the military and the different MOS's. So it is fun in its own right to me.