Please check the email id you've used to login. You can check this in the Settings page (https://rocketium.com/dashboard/settings)
This usually happens when you are working in multiple teams.
The videos you create as part of a team will only be visible within that team. If you switch your team and try searching for the video that you created in the other team, you will not find it.
To change your team, follow the following steps.
1. Click on the team button located at the top left corner of your screen, right next to the Rocketium logo.
2. The button will open a drop down list of all the teams that you are a part of. Select the team in which you created the video and you'll find all the videos you created as a part of that team.