Howdy! On the off chance you reading this consider yourself to be fairly new to the game, or just never really bothered to understand the damage system in Warframe, you are in luck! I have done an entire series of short, straight to the point videos on each damage type in the game individually, to the best of my knowledge, and are currently on the Damage 2.0 main page as well as every single damage type page.
While others in the past have done great reviews, discussions, and tutorials on the damage types in Warframe, it's often all damage types at once, or the videos are really long for what it is. Except for the first few, they all follow a logical progression and visual scheme, as well as them all being 2 minutes or less in length. While i admit to making a few minor mistakes and that i don't know everything 100% (which is why they are unofficial!) I feel they are a great starting point to those out there just starting out or even more seasoned players looking to finally get their hands dirty and build their weapons "properly".
Note: I did not do a video on Finisher damage, but i may in the future as a bonus, but i covered this mostly in the Slash WDR.
So here you are, at least for as long as this blog stays relevant (they will still be on their pages of course) i give you the complete Warframe Damage Rundown series :) Oh and here is a link to the full playlist so you can watch them in order: WDR