@mrmtta many thanks for advice! VW works, and is solves problem with div margin. According to videos — I optimise file size, now each of them is under 600 Kb, and all videos weights 2 MB. According to slow loading — I use free hosting for videos (and will use fast on site release), so they loads very slow.
Here is public link on this version:
https://preview.webflow.com/preview/portfolio-test-0110-22302f62a0f2f0d6c2c?preview=783ca960ebdab936dbd03113681be4a7
Now I can’t solve problem with margin: there is no margin on the bottom of the page (in Safari), but I set it:
And there is second little bug — when I upload videos in to they didn’t have equal size with images in other cards. But grid and settings is the safe. Difference is in few pixels, but it brakes the grid:
Thank you very much for help!