What I know is that a "montage" is a video where you show different plays of a single hero, while a music is playing. But I prefer putting this awesome video instead, it's only 1 minute and 30 seconds.
The name of the Hero is Invoker, my favorite hero... (I am not the player in this video just to say)
When using Invoker, you need to press a total of 5 buttons to use 1 skill. In this video, the player used so many skills, and that means he pressed so many buttons to execute that combo. Although I can do that combo myself, what's amazing in this video is that he got a "Rampage" which is a kill streak for consecutively killing 5 enemy Heroes. My highest consecutive kill streak is only "Ultra Kill" (Killing 4 enemy Heroes at a time). Im'ma admit that the player in this video is more epic than me.