You are free to submit as many applications as you want! But remember a few things:
1) Only submit the same series application once per 30 days. Please do not submit the same series application within 30 days. If you want to submit the same application again, you can, but wait for the next 30 day time period.
2) Do you have a few different series ideas? You can submit different applications for different series within 30 days, no problem! Just make sure you are not submitting the same series over and over.
And remember, video is unlocked per series / playlist. So if your application is approved for a video series, please keep to that story/style/tone as that is what the StoryFire Community has green-lighted and will want to see :)