Hey Raine,
From my experiences working as a software reviewer, I remember it being pretty tough to find any freeware in the video category. This isn't to say it doesn't exist, but it's not as common as other types of software.
I'll try to dig around sometime this week and find you something, but you may end up having to buy a program for this.
Also, to avoid adware before it installs itself, get yourself a program with a real-time shield;
Windows Defender and
WinPatrol both have this feature and are both free.