Yes — the resize option scales the WebM down before frame extraction, which dramatically shrinks GIF file size. A 480p GIF from a 4K WebM is roughly 16x smaller than a 4K GIF. Use /video-cutter/ for cropping in a separate step.
Animated GIF encoding is CPU-bound and slower than typical video re-encode — expect roughly 1x source duration. A 10-second WebM → GIF finishes in about 10 seconds; a 30-second clip in about 30. GIF is slightly slower than animated WebP due to palette computation.
Does the GIF animation preserve transparency from the WebM?