What type of Unity video ad should I use?

So, I am finishing up my game and I am about to hook in Unity ads. The game is a puzzle shooter with a lives system. My idea is when lives run out the player can either watch a video to refill lives or buy the ad free version for like $1.99.

My question is, should I use skip-able ads or force them to watch the full add to refill their lives?

I am wary of skip-able ads because it doesn’t seem they get you much money when using unity ads.

i think full video adds for getting extra life is way to go , unless you not forcing any user to watch a full video , cause in many games people put up adds which pop up during gameplay n not able to skip is bit annoying thats were skip adds should do the trick , but if the user wants some xtra fun watching a short video wont hurt at all