.. I've already watched, in part or whole, several of them; And my 'off-the-top-of-my-head' estimate, is that about 15% of these videos, {at most}, will 'speak' to most skeptics, {even less, if you're a 'hard core' skeptic}; But the cumalative effect..{I would think}, of all of these videos, is that.. unless one subscribes to the phenomena of regularly occurring, 'mass' delusions; Then there's probably a measure of authenticity/sincerity {if you will}, to even the 'inferiorly' presented, Christian testimonial videos!
 
By 'inferior'; I mean things like, too much background noise, to rambling discourses; ie. God can 'save' people, if they demonstrate a certain minimal-level threshold of faith, in Him; But they can Still be as verbally ineloquent, as they ever were! {LOL}.. including, hard to understand, accented English.
 
I watched one nine-minute video, {all under, the "YouTube" search term, "God testimonies"}; And the only thing I 'gleaned'.. is that one 'believer' husband and father, lost his family of 5 {I think}, in a torrential {USA} flood, in 2003; Without apparently losing his faith in God; Given that.. I suppose, it might cause more then a few Christian 'stragglers'-in-faith, to do so; Or at least to undergo a 'crisis' in one's own faith!
 
So as to make things minimally easier for both the skeptics & non-skeptics; The 'link' follows, at the end; Though you'll need to type-in the "YouTube" search-term: "God testimonies"..{without the quote marks}, on your own; Plus.. there's no guarantee, that the first viewed 2-to-3 videos that you choose; Will be necessarily 'worth your while'; Even if all of them, are presumably sincere. http://www.youtube.com