Can I ask, are you $25/mo. with the option to 'drop out' at any time, and I get to keep video's I've downloaded?

Also, my opinion is $25/mo. is reasonable for access to your videos. Congrats on your launch!

Looks like the gold plan allows you to download all of the videos.

Both plans allow you to download the videos

I would also love to take a sample test (or a 1 day free trial or something) so I can get an idea if it's righ for me before paying 25US$.

Looks awesome though!

May be you could keep the 25$ at the beginning, then give discount to those who unlock badges? say 15$ if you unlock 10 badges, or something like that?

What would the point of that be, other than to give up money? It doesn't make the barrier to entry any less.

It might be useful for retention in some form. If people are earning badges they are probably more likely to retain the membership for longer so they end up spending more in the long run.