The online video service Vimeo allows you to sell videos on their PRO paid tier plan. Setting up an account with them allows you to upload your videos, set a price for them and allow clients to purchase the videos. You can also group these videos into a "showcase" and embed a showcase on your OfferingTree website.
In order to do this, first upload your videos and then add them to a showcase.
Next, go to the showcase's embed feature and adjust the settings to ensure that the branding matches your own. When you are satisfied with the way things look in the preview, copy the embed code.
On your OfferingTree site admin panel, go to the page that you would like to add the video showcase. To add the Vimeo embed code, click the "plus" button on a new line in your page and then click the "integrations" icon.
Paste the integration code and save your page. Your Vimeo PRO showcase should now be integrated into a page on your OfferingTree site.