For a video or photo essay you will want to make sure you include a visual slide of your reference list not just for research but also for any audiovisual material used (songs, images, etc.). For a video essay make sure there is a long enough pause for each screen so your viewer has a chance to pause and read through your references.
For a podcast project, providing your reference list may depend on what the assignment prompt requests. However, you have a few options. They can be turned in by way of a separate document, in the same way you would for a written essay. Depending on what platform you publish your podcast on, you can include your reference list in the description box.