> My professor told me that I can use the video if there are not people shown on it.
If you are sure that your professor has the neccessary background regarding copyright law, then you should be fine. However, please consider that violating copyright may cause expensive mail from lawyers and shutting down the survey just during data collection. Therefore, please make sure that the information is correct.
> I have created the file myself and have not used any licensed content
Please choose the one that fits the situation best. The selection is actually to make users think about copyright - because lots of people are not aware that uploading content on SoSci Survey is "putting this content on the Internet".