What does it take/what do you need to become a video editor?

I would say learn the systems. Right now, Adobe Creative Cloud is a very popular software but Final Cut X has made some improvements (as announced at this past NAB conference). It can't hurt to have knowledge of all programs but be extremely proficient in one of the tools.

Look into local groups - there are a lot of editor groups that meet monthly and it is great for networking. If you can take workshops to learn new techniques and skills - do it. Take classes in college as well. Apple might run some classes that you can take as well.

Lynda.com is a great resource as well - there are a ton of video tutorials from basic editing to more complex effects techniques.

Lastly, intern or shadow at post production houses as much as you can. Express interest, ask questions, ask to sit in on edit sessions or watch editors doing things so you can learn.

Hi,

Today's video editors work with digital files, and most of the editing is done with non-linear video editing software. Video editors capture raw digital footage from cameras and select the segments to include in the finished product. They arrange the segments on a timeline in the correct order to match the final script. Other types of media, such as sound effects, music, dialogue and animation, may also be added.

After adding all necessary components, the entire project is rendered to its final format for release as a motion picture, DVD, YouTube video or other medium. Editors may work shut away in rooms by themselves for hours on end. Those who are self-employed may continually be on the hunt for their next assignment and may have to wait periods of time between jobs.

Step 1: Earn a Bachelor's Degree
Degree programs geared only toward video editing are limited. Video editing is usually included as part of a film, video or multimedia production degree program, and that inclusion is usually only a small part of the entire film production process that is covered in the curriculum. These course topics might include non-linear editing, digital video production and digital post-production. Some programs may offer a digital production practicum where students gain real-world hands-on training.

Step 2: Create a Demo Reel
In the film industry, a demo reel serves as the editor's portfolio. Employers generally want to see the kind of work a job applicant is capable of doing, and a demo reels serves that purpose. Students who attend a degree program will most likely have to develop a demo reel as part of the graduation requirement. A demo reel consists of selections from the editor's best work, demonstrating his or her editing skills and technical proficiency.

Step 3: Gain Experience
Employers prefer applicants who have experience in the technology they use as well as video editing methods. Graduates and new editors will likely have to accept assistant editor positions in order to obtain the necessary experience. There are also short-term freelance jobs available whereby graduates and new editors can earn some valuable on-the-job experience in video editing.

Success Tip:

Volunteer at a local cable-access station. Most larger communities have a local cable-access station. The programming is generally done by community members on a volunteer basis, and many producers will be happy to accept free editing services. Professional work done for free still counts as experience.

Step 5: Maintain Proficiency
Updates to software programs and equipment occur often to keep up with global trends, consumer demand or simply to make completing tasks more efficient. As such, professional video editors should consider taking continuing education classes offered by colleges or software companies to keep their skills current.

http://study.com/articles/Become_a_Professional_Video_Editor_Education_and_Career_Roadmap.html

Best of Luck!