Display video descriptions

Hello, I am new to Envato Elements and After Effects and just purchased a monthly subscription for a test run hoping to upgrade as my skills improve to an annual account. I would like to know if the lack of a detailed description is common among most of the author’s templates provided? If so, is there a step I’m missing to determine details such as the number of photos/videos placeholders available and if a video display has photo placeholders only. Or do I assume if the template preview only shows photos that it will not allow for videos. Otherwise I am having to download the templates (time-consuming), without a license, to view the template in After Effects and determine if it is what I need. Thanks in advance for your advice.