1) I can add video from web-version of TikTok https://www.tiktok.com/@robson_642/video/6938320459368844545?sender_device=pc&sender_web_id=6945531062363014661&is_from_webapp=v3&is_copy_url=0

But as result for me it display broken captcha on ES 3: https://es4.stackideas.com/stream/item/410
– screenshots attached.

2) the same video in TikTok mobile app has shortie link (if press "share" > "copy link":
https://vm.tiktok.com/ZMeyVq5Ub/
and it's impossible to add this link to EasySocial.

Thanks for report, it seems like the TikTok developer documentation does not have mention about this shortener link for embed https://developers.tiktok.com/doc/Embed , I will log into issue tracker and see if we can find out any workaround solution for this.