Add missing regex anchor detected by CodeQL

internal/reader/processor/processor.go

@@ -26,7 +26,7 @@ import (
 )
 
 var (
-	youtubeRegex           = regexp.MustCompile(`youtube\.com/watch\?v=(.*)`)
+	youtubeRegex           = regexp.MustCompile(`youtube\.com/watch\?v=(.*)$`)
 	odyseeRegex            = regexp.MustCompile(`^https://odysee\.com`)
 	iso8601Regex           = regexp.MustCompile(`^P((?P<year>\d+)Y)?((?P<month>\d+)M)?((?P<week>\d+)W)?((?P<day>\d+)D)?(T((?P<hour>\d+)H)?((?P<minute>\d+)M)?((?P<second>\d+)S)?)?$`)
 	customReplaceRuleRegex = regexp.MustCompile(`rewrite\("(.*)"\|"(.*)"\)`)

internal/reader/rewrite/rewrite_functions.go

@@ -20,7 +20,7 @@ import (
 )
 
 var (
-	youtubeRegex   = regexp.MustCompile(`youtube\.com/watch\?v=(.*)`)
+	youtubeRegex   = regexp.MustCompile(`youtube\.com/watch\?v=(.*)$`)
 	youtubeIdRegex = regexp.MustCompile(`youtube_id"?\s*[:=]\s*"([a-zA-Z0-9_-]{11})"`)
 	invidioRegex   = regexp.MustCompile(`https?://(.*)/watch\?v=(.*)`)
 	imgRegex       = regexp.MustCompile(`<img [^>]+>`)

internal/reader/sanitizer/sanitizer.go

@@ -19,7 +19,7 @@ import (
 )
 
 var (
-	youtubeEmbedRegex = regexp.MustCompile(`//www\.youtube\.com/embed/(.*)`)
+	youtubeEmbedRegex = regexp.MustCompile(`//www\.youtube\.com/embed/(.*)$`)
 	tagAllowList      = map[string][]string{
 		"a":          {"href", "title", "id"},
 		"abbr":       {"title"},

internal/reader/subscription/finder.go

@@ -23,8 +23,8 @@ import (
 )
 
 var (
-	youtubeChannelRegex = regexp.MustCompile(`youtube\.com/channel/(.*)`)
-	youtubeVideoRegex   = regexp.MustCompile(`youtube\.com/watch\?v=(.*)`)
+	youtubeChannelRegex = regexp.MustCompile(`youtube\.com/channel/(.*)$`)
+	youtubeVideoRegex   = regexp.MustCompile(`youtube\.com/watch\?v=(.*)$`)
 )
 
 type SubscriptionFinder struct {