You can't get the things you get from the API from videos alone. If a player wants to see the amount of mana an enemy has, he has to click on the enemy, you don

You can't get the things you get from the API from videos alone. If a player wants to see the amount of mana an enemy has, he has to click on the enemy, you don't see it usually. Same for items. There is an active component in information gathering in Dota (and those actions take time/clicks away from other things you could do at the same time).