Youngest baby to talk (Turn on CC to see age at each clip)

The video compilation starts when he is 26 days old (3 weeks 5 days,) and ends with the last clip about his "dinosaur bone theory" (3 years 2 months old.) He said his first word at 7 hours old, but he spoke so little the first week, we couldn't catch anything in the 5 minutes of recording him each day with the phone. I did capture him talking younger, but I may have lost those videos with that computer. These videos I sent to family members.
His sister started to mimic speak around 1-2 weeks old, but he spoke in context without going through the mimic stage. (His first world was a mimic of mamma, but he used the word in context later the same day.)
His language stays progressed as he can form 9 word sentences at 2+ years old, like "I fell on the floor and hit my knee."
I was left with the question, if my kids were gifted with language, or they are normal, and I'm the one doing something different by engaging them. (or a mixture of the two.) But then my dog started talking and I realized it's all about hearing. Humans hear in a very narrow bandwidth of sounds in the human speech range. Our babies speak outside this range, so many people can't even hear/distinguish the sounds until a certain point (or their brain can't put the sounds together.) 97% of the humans brain responds to human vocal range first. That's why you probably don't know the voice of every cat and dog you met. You probably can't tell one meow from another. We likely miss a lot of sounds in nature, and would not be able to even understand if animals were talking with animal words or just making sounds. (You can be color blind and still believe colors exists though!) You may not hear the language in the first couple clips, but start hearing it later. That would be a good indication hearing is the problem. I would love comments to help me understand this.
Here's what the ridiculous Google results will tell you:
"By 5 years... your child will be able to use long sentences of up to 9 words." raisingchildren.net.au
"While most children say their first word at around 1 year of age, gifted children may begin speaking when they are 9 months old" - verywellfamily.com
Parents "should be hearing vowel and consonant babbling by 8 or 9 months, and it continues as your baby starts to form words around 12 months," Dr. Briggs says. parents.com
Talking Dog: Veesheeballa (our real talking dog speaks in dog-dialect English)
• Veesheeballa (Talking ...

[@UmmulkhairiIbrahim-io7we]

Omg..he is so cute and adorable ❤️💕💕

[@vsharmishtha16]

Lots of love and good health and success to this baby. May God shower all blessings on you.

[@theriverschool822]

Thank you. I always worry I'm doing enough to keep him stimulated. He's 4 now, and as he like to say, "He has the energy of five people." Einstein didn't talk until he was 3 years old. I see early language as narrow specialty my (two) kids are really good at, not as some kind of genius kids. They are also both very creative. They will have some unique talents. I hope they use them to make the world a better place, and both grow up to be kind respectful critical thinking adults.