From 4407433bd31df5526df0dd167d2d9d9d878a09d1 Mon Sep 17 00:00:00 2001
From: Tim Keller <tjk@tjkeller.xyz>
Date: Fri, 22 May 2026 10:37:15 -0500
Subject: support yt url queries for start time, etc

---
 watch.go | 33 +++++++++++++++++++++++++++++----
 1 file changed, 29 insertions(+), 4 deletions(-)

(limited to 'watch.go')

diff --git a/watch.go b/watch.go
index 81f0d86..bc96bd9 100644
--- a/watch.go
+++ b/watch.go
@@ -3,6 +3,7 @@ package main
 import (
 	"html/template"
 	"net/http"
+	"net/url"
 )
 
 var templateWatchFiles = []string{ "templates/base.html", "templates/watch.html" }
@@ -10,15 +11,39 @@ var templateWatch = template.Must(template.ParseFiles(templateWatchFiles...))
 
 /* render template */
 type WatchTemplateData struct {
-	Id string
+	Src string
 }
 
-func renderWatchTemplate(w http.ResponseWriter, id string) {
+func renderWatchTemplate(w http.ResponseWriter, id string, rawQuery string) {
 	if debug {
 		reloadTemplate(&templateWatch, templateWatchFiles...)
 	}
+
+	// construct url query from existing rawQuery
+	q, parseErr := url.ParseQuery(rawQuery)
+	if parseErr != nil {
+		templateError(parseErr, w)
+		return
+	}
+	q.Add("enablejsapi", "1")
+	q.Add("autoplay", "1")
+	q.Del("v")
+	if q.Has("t") {
+		q.Add("start", q.Get("t")) // translate 't' to 'start' (embed equivalent)
+		q.Del("t")
+	}
+
+	// construct url
+	u, urlErr := url.Parse("https://www.youtube-nocookie.com/embed/" + id)
+	if urlErr != nil {
+		templateError(urlErr, w)
+		return
+	}
+	u.RawQuery = q.Encode()
+
+	// execute template
 	err := templateWatch.Execute(w, WatchTemplateData{
-		Id: id,
+		Src: u.String(),
 	})
 	if err != nil {
 		templateError(err, w)
@@ -29,6 +54,6 @@ func renderWatchTemplate(w http.ResponseWriter, id string) {
 func registerRoutesWatch(mux *http.ServeMux) {
 	mux.HandleFunc("/watch", func(w http.ResponseWriter, r *http.Request) {
 		id := r.URL.Query().Get("v")
-		renderWatchTemplate(w, id)
+		renderWatchTemplate(w, id, r.URL.RawQuery)
 	})
 }
-- 
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