You can upload a file on Google Forms, allowing you to add an image or video to supplement your questions. You can also allow respondents to upload their own files to your Google Form.

Tips for Images and Files Make sure that the images you use on your website are not copyright protected. If you are inserting images using a file chooser, please resize them to the recommended size ...

Vert is a website that converts image, audio, video, and document files without the need to upload anything (mostly). Here's now it works.