[Paulstar]

If he gets 50,000 subscribers globally at $3 per month ($36 annual subscription (10 cents a day) he's got $1.5m to play with.
Plug in ad revenue with product placements as suggested above and there's more income to be had.
$5k per video x 52 videos per year = $260,000 production costs
Let's assume another $240,000 in costs I haven't considered.
That leaves a clean million in the kick.
If he can't make that equation work he should pack it in.
Bottom line (for me anyway) it's not the fact that he's charging that's the issue, he's charging too much.
I know there is the argument of a smaller group of high value clients paying more and staying loyal vs low value who may only subscribe for one year then bail, but to get the ball rolling I would have gone with a lower cost model personally.
Then again I'm not Chris Harris and have 0 followers!

I think 5k per video is very conservative, the quality of his videos is good - broadcast quality even. Also I get the sense he travels a lot to film so he either has to take his crew or find local guys to do the work.  He likely cannot support his production costs + eat with banner ads he needs to be smarter and create sponsorship opportunities.