No offence, but if it is acceptable for you to rubbish the work of a published historian because you don't like his opinions, why should anybody take what you have to say at face value, when you haven't even bothered to provide a source?
Some questions that spring immediately to mind:
How long would those slaves you mention have lived for as slaves under Arab or African ownership, as they had been prior to being sold by their owners in exchange for goods made by English child labourers?
How does the longevity of the slaves you mention compare to the worldwide population at that time? Even in rich countries, it was normal for a typical young person to die from what we now consider mild infections. British society was brutal at that time for the lower orders in particular. Disease, cold, hunger. How does it compare to sailors of that time, including those serving in the navy - their ife expectancies were shockingly poor compared to what we would expect today.
What numbers of slaves were taken to the West Indies and then moved elsewhere?
I could ask many more questions. Your post is completely lacking any context. It's just throwing big numbers about and only reinforces the impression we have of your strange biases.
Besides which, Webb isn't obliged to make a video that comprehensively covers all places and peoples, just because somebody like you might then make insinuations. His videos are typically no more than 8 minutes long. Why should the fortunes of, say, black slaves in the US not be compared to the indentured white labour there? Perfectly legitimate topic of conversation, particularly as the main reason slavery is such an ever present topic in our society is precisely because it existed in the US - which dominates our own cultural landscape.