Meet the Spy hasn't been released unfortunately.

:D

In the Dota 2 game menu press the gear at the top left, and go to the videos tab. There'll be options there http://i.imgur.com/xjgP0ZG.png

Like your second picture says, you'll have to change the actual rendering quality to a higher setting. The resolution doesn't matter

You'll have to change your video quality in the Dota 2 game view

art

potassium

rofl

Your video is only worth working on if you think it's worth working on. There's no point on working on a personal project if you don't enjoy making it. Making videos for popularity is generally a bad idea cause there is never a sure-way of your video getting popular. Quality does play a part in viewership, though. Good quality work usually is more likely to be noticed, but like I said earlier, it's not garuanteed.

As far as I know, the newer SFM updates have broken the physics rig. I'll try it out again to see if it still works.