He says it is 750 feet by 150 feet and cylinder shaped. He also says it appears to be in good shape and well maintained. Which, after watching his video I personally find it difficult to judge as the quality and resolution is not the greatest when he zooms in on the thing.
I am not sure how he comes up with or concludes that the thing is 750 feet by 150 feet. As he rotates around it does kind of appear cylinder shaped.
The guy suggests that it might be a base and speculates how it got there, but wisely doesn't say for sure. He says here is what I found, this is where it is located, check it out and see what you make of it.
I would expect the conspiracy sites have already picked up on this story and I can only imagine what they are saying it is or how it got there.
Personally I think it is just too blurry and not detailed enough to make anything out of it.
Check it out on youtube if interested:
Bio Station Alpha on Mars. The latest discovery by David Martines. Original Video
