Is it feasible to just be writing articles on some blog you created or do you have to create videos and be apart of known websites like gamespot/ign?
Totally feasible. You want to build a resume and a catalog of work. Even if you don't get attention at your blog you created (and with today's internet there's no excuse to not market yourself even if it's just a twitter account or instagram), you have a body of work you can use to get that next step at a more established site as a contributor.
I don't work in gaming, but the path is similar to any field you want to cover.
I work in comics, and an example I can give you for the portfolio process is pitching to editorial about a C Lister like Hellcat or Cloak and Dagger. Everyone wants to do X-Men and Spider-Man - the big leagues. That's boring as an editor. It might even be all they're good for.
Pitch a Hellcat story that piques my interest, and you've got potential. If you can make a worthy Hellcat story, and the script delivers, you can get that chance in print, or just going off of your skill level and creative energy, you can get fast tracked to something bigger to start.
Build that writing skill and have the body of work that shows you aren't a one trick pony.
Three keys to success. Most people only ever have 2 in some combo.
Talent.
Persistence.
Luck.
Talent is great. Not everyone has the talent, innate or earned through effort.
We all look at singers, artists, writers, actors, and wonder how the hell they got where they are.
Persistence - kept showing up no matter how many rejections. Pays out eventually. Luck - right place, right time. Knew someone.