I just wrote a lengthy review on this vacuum which explains how to use it. I don't know if you ever found your instruction video, but if you haven't purchased the vacuum yet, I can tell you that the instructions that come with the vacuum are not very long and are very easy to follow.
Basically, you charge the vacuum on its docking station when it arrives (first you have to turn on the on/off button on the bottom of the vacuum). Make sure you have things picked up in your home so that the vacuum won't roll over cords and things. You can download the app to your phone if you want, but it isn't required to use the vacuum. If you download the app, make sure your Bluetooth is on and then link to the vacuum. It also comes with a remote control and batteries for the remote. When the vacuum is charged, press the auto clean button. There are 3 locations where you can find this button (1) on the top of the vacuum, (2) on the remote control, (3) on the app. The vacuum will maneuver itself around and will return to the docking station when it has finished. You may need to empty the dust bin before it finishes vacuuming. If so, just press the pause button on the vacuum, the remote, or the app and remove the dust bin. Empty it and replace it and press the same button to start it back up again. I had to do that and I had vacuumed my house the day before with a regular vacuum, but this vacuum was able to get under my low tables so it picked up dirt that my other vacuum hadn't gotten.