"The video is flawed because it's basically the Kalam Cosmological argument, which has been critiqued and debunked already. According to the video, the God of the Bible didn't have a cause. That is an assertion. How do you demonstrate that that assertion is actually true?"
1. While we should always think for ourselves, I can assure you of this- Sproul was a brilliant man, having studied and taught philosophy in university. Saying it is debunked vs being able to debunk it yourself is cute, but it means you are letting someone else do the thinking for you. Are you unable to critique his commentary point by point?
2. Something must exist without having a cause- this is simple logic. Either matter and energy must exist this way, or something outside of matter, energy, and time must. Again, what does our knowledge from science tell us?
We know that matter is not infinite, and that it is constantly falling from order into disorder. We also know that energy cannot exist in its current form forever, and goes from functional to useless.
If there ever was a time when there was nothing, then nothing would exist. This is such a huge problem for the atheist scientists, that they have started stating that this is possible- talk about a logical fallacy!
The prevailing theory is that around 13 billion years ago, all matter was concentrated in an impossibly small space, and then for no reason that can be understood, it all exploded. Forget the fact that explosions do not result in order, the real problem here is that if that matter was in that state for 'eternity past', it would still be in that state today without some outside force to act upon it. This begs the question- where did that outside force come from?
You do not have a cosmological answer to this, and you will never find one given that God is the answer.
