You can't understand Bangla
In short, he is taking the piss on other YouTubers.
He is fact checking some news and discrediting a few channels and their videos on the topic of Bangladesh acquiring the J10C.
He also has a massive ego, this is perceivable through his tone and choice of words.
A Chinese defence website, made a general article about why china should try and export the J10C to Bangladesh, Pakistan and Laos, basically just to capture those markets. It's an editorial piece.
Some Indian defence site put a spin to it, and claimed china China wants to sell J10C to Bangladesh.
Then two Bangladeshi sites namely, South Asian monitor and financial express copied the Indian article but changed article headline to something like Bangladesh is set to buy the J10C.
Following these Bangla news articles, the YouTube channels made their videos.
In this video he goes over this and also states that he has sources who told him about BAFs plan to purchase the J10C all the way back in Jan 2018.
Basically, he is the greatest, most credible Bangladeshi defence YouTuber and he totally doesn't stalk PDF for news and he totally doesn't whore around for subscribers by making videos attacking other channels.
Incompetent blobs will screw it up as always.