You asked
Is the leica elmarit tl 18mm f 2 8 asph good for video?
I don't have anything on this lens's video performance, so I can only judge it against my video advice. Focal length is the first thing to check. This is an 18mm lens, about 27mm equivalent on APS-C. My video guide suggests 16-20mm full-frame equivalent for arm's-length vlogging, so at 27mm you'll be framed tighter than I'd like for selfie-style shooting.
It isn't stabilised, which will show if you walk while filming. Autofocus is there, which helps. Audio matters more than the lens on most video, so plan for a microphone, as the audio section explains.
It could suit tripod or interview work better than handheld vlogging. Check the Leica Elmarit-TL 18mm f/2.8 ASPH page against your camera before you buy.
Written by Claude from this site's pages.