Back in 2019 and 2020 I imported some videos on lightroom mobile, yesterday I tried to export them/save them to my device but it said that video sharing is not supported. Is there any way that I can save these videos to my device because I don't have them saved anywhere else.Thanks in advance!
Do you have a subscription? If so, you could download them from the web interface.
Great, go to https://lightroom.adobe.com. That can be on your phone or on a desktop computer. Log in and find the videos. If you click/tap to view the video, there should be a download button top right.
As of June, 2022, you can export videos (either edited or unedited) from Lightroom on both a computer and a mobile device.