eBay video :
The videos are uploaded directly to eBay's server, they are connected to your eBay account and cannot be used outside eBay. They will be displayed in the second position in Photo Gallery. eBay does not provide method to display them in descriptions.

Youtube video :
Youtube is a platform for video streaming and sharing, it does not provide a video source that can be played directly, sellers can only use the video page URL in listing descriptions, either as standalone links or as links on pictures. 

HTML5 video :
Sellers can upload videos to video hosting platforms like Kizoa and get a video source that can be played directly, then use HTML5 video tag to insert a video block in listing description, these videos can be played in descriptions directly.

* For adding eBay-hosted videos, please refer to  this tutorial

According to eBay's requirement, sellers cannot include links that will lead buyers to websites other than eBay, but there are some exceptional cases, like inserting product introduction or installation tutorial videos, or links related to some legal information.

Youtube link is allowed in this case, and sellers can add Yoube link in SoldEazy.

* "Youtube link" here refers to a URL that points to a specific Youtube page.

* iframe is considered as active content on eBay, and is banned since 2017, please do not use iframe to insert Youtube video.

Reference:

https://www.ebay.com/help/policies/listing-policies/links-policy?id=4248

There are 2 ways to insert Youtube video link:

First: insert only in one listing

1. Go to datasheet, click edit, go to Photo and find the column "Poster", insert a Youtube link here

2. Go to the template that this datasheet is using, insert a module called "poster", then synchronize datasheet to eBay.

* Other listings that are using this template will not be affected since you did not include "Poster link" in datasheet

Second way: insert Youtube link in template and apply to all datasheets

Go to template, click "Body", choose "picture banner" and drag to template, click the inserted module to set thumb photo and URL to go to.

Here is an example of case 2

User may use the "description text01" to "text10" editors to add HTML5 videos. Please click to enter "source code" mode and input <video> tag

In general, there are two ways to write a <video> tag

1.
<video controls="" src=" https://ugc.kizoa.app/kgra1/f21957586_7365217.mp4 ">&nbsp;</video>

2.
<video controls="">
<source src=" https://ugc.kizoa.app/kgra1/f21957586_7365217.mp4 " type="video/mp4">
</video>

Although eBay recommended the second format, it is not support in SoldEazy, so please use the first format to write HTML codes.

* If you want to insert HTML5 video tag, you have to make sure the video link is pointing directly to the video source, rather than to a web page. If your link is Youtube or Vimeo link, you may not use HTML5 video tag to insert.