No. Everyone will know that they are marketing material, you’ll be downvoted and ridiculed, and your reddit account may be banned for spamming. Don’t try to game reddit in any way. If you want to post something there related to your business, make it a news story on a reputable news media site. The possible exception is if you have a genuinely funny or intriguing viral video. Think along the lines of “Will It Blend?” Are your videos that interesting? If not, then don’t try to post them.
In general it’s a better strategy to get lots of fans, friends, and followers on social media, and then post your video there and let other people submit it to reddit.
Wikipedia logs IP addresses of users who are not logged in. If your new article or edit traces back to an IP block associated with your company, you will be found out. It’s not worth the risk.
Post a note to the “Talk” page for your article explaining the situation: who you are, what you need changed, and why (back up your facts with sources). Factual inaccuracies are easily addressed this way. Other changes/additions may prove much harder. If you aren’t getting any response/action after a month or two, post a note about your needs on the Conflict of Interest notice board in Wikipedia.