incidentally I've seen both of these videos before. but you miss the point, my first message took it has a given that they're different languages and I asked you: why are you speaking Hindi rather than Urdu, or at least more Hindi than Urdu?
on them being separate languages, I've nothing much to say. Urdu is an Indian language anyway, originating in UP and spoken by a specific set of UP elites. literary Urdu is Hindustani stuffed with Persian and Arabic, literary (Modern Standard) Hindi is Hindustani stuffed with Sanskrit. stuffing Arabic words in Hindustani is perhaps weirder than stuffing Sanskrit, considering the sentence structure etc, and I don't know much about the Persian.
but they're both unnatural and nobody speaks like that. you speak Hindi with the same sentence structure as the rest of Hindi with 3/4 Sanskrit origin (through Prakrit) words anyway.