Todo mal, realicé varias veces el mismo procedimiento segun el video y sigo teniendo un error. No entiendo nada, nunca he usado git ni node, ni la consola.

130588 warn ed-boilerplate@1.0.0 No repository field.
230589 warn optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules\fsevents):
330590 warn notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
430591 verbose notsup SKIPPING OPTIONAL DEPENDENCY: Valid OS:    darwin
530591 verbose notsup SKIPPING OPTIONAL DEPENDENCY: Valid Arch:  any
630591 verbose notsup SKIPPING OPTIONAL DEPENDENCY: Actual OS:   win32
730591 verbose notsup SKIPPING OPTIONAL DEPENDENCY: Actual Arch: x64
830592 verbose stack Error: node-sass@4.11.0 postinstall: `node scripts/build.js`
930592 verbose stack Exit status 1
1030592 verbose stack     at EventEmitter.<anonymous> (C:\Program Files\nodejs\node_modules\npm\node_modules\npm-lifecycle\index.js:326:16)
1130592 verbose stack     at EventEmitter.emit (events.js:209:13)
1230592 verbose stack     at ChildProcess.<anonymous> (C:\Program Files\nodejs\node_modules\npm\node_modules\npm-lifecycle\lib\spawn.js:55:14)
1330592 verbose stack     at ChildProcess.emit (events.js:209:13)
1430592 verbose stack     at maybeClose (internal/child_process.js:1021:16)
1530592 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:283:5)
1630593 verbose pkgid node-sass@4.11.0
1730594 verbose cwd E:\G&L\gl
1830595 verbose Windows_NT 10.0.18362
1930596 verbose argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install"
2030597 verbose node v12.10.0
2130598 verbose npm  v6.10.3
2230599 error code ELIFECYCLE
2330600 error errno 1
2430601 error node-sass@4.11.0 postinstall: `node scripts/build.js`
2530601 error Exit status 1
2630602 error Failed at the node-sass@4.11.0 postinstall script.
2730602 error This is probably not a problem with npm. There is likely additional logging output above.
2830603 verbose exit [ 1, true ]

El error dejó un archivo.log, anexo el trozo desde donde se ve que comienza a fallar.