We can pick cognates in Lithuanian and Latvian. For example, ezhik – ežiukas – hedgehog, led – ledas – ice, snieg – sniegas-snow. Many other. We opened a topic on cognates once. It was a surprise the number of cognates between Baltic and Slavic languages. Not all cognates are obvious.
Lithuanians have Slavic like mentality. Latgalians too. Despite both are Roman Catholic. Latvians probably have little less Slavic like mentality than Lithuanians and Latgalians due to long association with the Germans.
Start watching at 6:15. That’s standard Lithuanian from south-eastern Lithuania. Doesn’t she look and sound eastern Slavic?