I'm not really sure if all those videos are true, but it's possible to attain Siddhis (or some occult powers) through birth as mentioned in Sutra 1, Adhyaya 4 of Patanjali Yoga Sutras.
जन्मओषधिमन्त्रतपस्समाधिजाः सिद्धयः ॥१॥
janma-oṣadhi-mantra-tapas-samādhi-jāḥ siddhayaḥ ॥1॥
The Siddhis (powers) are attained by birth, chemical means, power of
words, mortification or concentration.
Swami Vivekananda commentary:
Sometimes a man is born with the Siddhis, powers, of course from the
exercise of powers he had in his previous birth. In this birth he is
born, as it were, to enjoy the fruits of them. It is said of Kapila,
the great father of the Sankhya Philosophy, that he was a born Siddha,
which means, literally, a man who has attained to success.
Commentary of Vyasa: (translated by Ganganatha Jha)
Com :— The Power due to birth is brought about by corporeal
change, " By herbs: " e.g, the medicinal preparations in the house
of the Asaras (i.e, Påtåla) " By incantations." Such as the
acquirement of " Molecularity " (Animå ), "By austerities" the
capability of approaching the sky, accomplishment of desire, e.g,
being capable of attaining any desirable form, the yogi moves about
here, there and everywhere, in accordance with his own unimpeded
will, The Powers due to Meditation have already been described.
Notes :—( 1 ) "Corporeal change' - Sometimes the actions of the yogi in his earthly life are developed to such on extent that he is
directly born among the gods, with a celestial body, and as such
molecularity ind the rest come to him naturally,
These occult powers in those kids might be due to their past birth vasanas.