Offer players to watch video ad for some bonuses

I've seen this in some games - you agree to watch a video ad and in return get some coins or addition lives etc.

Which ad networks support this feature?

Is there a C2 plugin for this?

appodeal did this

but they doesn't support c2 anymore

but still you can use older version, they are still working

More information here:

https://blog.appodeal.com/blog/2017/11/ ... y-changes/

Thank you!