Yes. However, you can only use Youtube links in the listing description for videos at this time, and the system will automatically add your video after the listing. You can add up to 5 youtube links in the description.
Further, please ensure that you don't have any watermarks, branding, etc., within the video for the reasons mentioned above. So if you want to share videos in the listing, please edit parts of the video that have your branding and then upload it as a new video on youtube to share the link in the description.
If you don't have youtube videos, then you cannot add links in the description. In that case, you can mention that you do video, and once the client inquires, you can send the video link.