fix(video-edit): ffmpeg核心优先切换为npmmirror可用地址

app/static/public/js/video.js

@@ -634,11 +634,13 @@
       const candidates = {
         coreURL: [
           '/static/vendor/ffmpeg/ffmpeg-core.js',
+          'https://registry.npmmirror.com/@ffmpeg/core/0.12.6/files/dist/umd/ffmpeg-core.js',
           'https://cdn.jsdelivr.net/npm/@ffmpeg/core@0.12.6/dist/umd/ffmpeg-core.js',
           'https://unpkg.com/@ffmpeg/core@0.12.6/dist/umd/ffmpeg-core.js',
         ],
         wasmURL: [
           '/static/vendor/ffmpeg/ffmpeg-core.wasm',
+          'https://registry.npmmirror.com/@ffmpeg/core/0.12.6/files/dist/umd/ffmpeg-core.wasm',
           'https://cdn.jsdelivr.net/npm/@ffmpeg/core@0.12.6/dist/umd/ffmpeg-core.wasm',
           'https://unpkg.com/@ffmpeg/core@0.12.6/dist/umd/ffmpeg-core.wasm',
         ],