Here's a truly wonderful naval history channel
https://www.youtube.com/channel/UC4mftUX7apmV1vsVXZh7RTw
And for all things armored and tanky
https://www.youtube.com/channel/UChl-XKVVBAzoEVsnbOfpcqw
Fun baseball channel
https://www.youtube.com/channel/UCl9E4Zxa8CVr2LBLD0_TaNg