diff --git a/app/liquid_tags/youtube_tag.rb b/app/liquid_tags/youtube_tag.rb
index 986f0ca9e..1d588f33e 100644
--- a/app/liquid_tags/youtube_tag.rb
+++ b/app/liquid_tags/youtube_tag.rb
@@ -1,8 +1,8 @@
 class YoutubeTag < LiquidTagBase
   PARTIAL = "liquids/youtube".freeze
   # rubocop:disable Layout/LineLength
-  REGISTRY_REGEXP = %r{https?://(?:www\.)?(?:youtube\.com|youtu\.be)/(?:embed/|watch\?v=)?(?<video_id>[a-zA-Z0-9_-]{11})(?:(?:&|\?)(?:t=|start=)(?<time_parameter>(?:\d{1,}h)?(?:\d{1,2}m)?(?:\d{1,2}s)?))?}
-  VALID_ID_REGEXP = /\A(?<video_id>[a-zA-Z0-9_-]{11})(?:(?:&|\?)(?:t=|start=)(?<time_parameter>(?:\d{1,}h)?(?:\d{1,2}m)?(?:\d{1,2}s)?))?\Z/
+  REGISTRY_REGEXP = %r{https?://(?:www\.)?(?:youtube\.com|youtu\.be)/(?:embed/|watch\?v=)?(?<video_id>[a-zA-Z0-9_-]{11})(?:(?:&|\?)(?:t=|start=)(?<time_parameter>\d+s?|(?:\d{1,}h)?(?:\d{1,2}m)?(?:\d{1,2}s)?))?}
+  VALID_ID_REGEXP = /\A(?<video_id>[a-zA-Z0-9_-]{11})(?:(?:&|\?)(?:t=|start=)(?<time_parameter>\d+s?|(?:\d{1,}h)?(?:\d{1,2}m)?(?:\d{1,2}s)?))?\Z/
   # rubocop:enable Layout/LineLength
   REGEXP_OPTIONS = [REGISTRY_REGEXP, VALID_ID_REGEXP].freeze
 
@@ -47,7 +47,7 @@ class YoutubeTag < LiquidTagBase
   end
 
   def translate_start_time(video_id, time_parameter)
-    return "#{video_id}?start=#{time_parameter}" if time_parameter.match?(/\A\d+\Z/)
+    return "#{video_id}?start=#{time_parameter.delete_suffix('s')}" if time_parameter.match?(/\A\d+s?\Z/)
 
     time_elements = time_parameter.split(/[a-z]/)
     time_markers = time_parameter.split(/\d+/)[1..]
diff --git a/spec/liquid_tags/youtube_tag_spec.rb b/spec/liquid_tags/youtube_tag_spec.rb
index 0432ca3ad..48e7133f6 100644
--- a/spec/liquid_tags/youtube_tag_spec.rb
+++ b/spec/liquid_tags/youtube_tag_spec.rb
@@ -4,6 +4,8 @@ RSpec.describe YoutubeTag, type: :liquid_tag do
   describe "#id" do
     let(:valid_id_no_time) { "fhH5xX_yW6U" }
     let(:valid_id_with_time) { "fhH5xX_yW6U?t=0h5m0s" }
+    let(:valid_id_with_time_num) { "fhH5xX_yW6U?t=300" }
+    let(:valid_id_with_time_sec) { "fhH5xX_yW6U?t=300s" }
     let(:invalid_id) { Faker::Lorem.characters(number: rand(12..100)) }
 
     def generate_new_liquid(id)
@@ -26,6 +28,20 @@ RSpec.describe YoutubeTag, type: :liquid_tag do
       expect(liquid).to include('src="https://www.youtube.com/embed/fhH5xX_yW6U?start=300"')
     end
 
+    it "accepts valid YouTube ID with starting time as integer" do
+      liquid = generate_new_liquid(valid_id_with_time_num).render
+
+      expect(liquid).to include('<iframe')
+      expect(liquid).to include('src="https://www.youtube.com/embed/fhH5xX_yW6U?start=300"')
+    end
+
+    it "accepts valid YouTube ID with starting time in seconds" do
+      liquid = generate_new_liquid(valid_id_with_time_sec).render
+
+      expect(liquid).to include('<iframe')
+      expect(liquid).to include('src="https://www.youtube.com/embed/fhH5xX_yW6U?start=300"')
+    end
+
     it "accepts YouTube ID with no start time and an empty space" do
       liquid = generate_new_liquid("#{valid_id_no_time} ").render
 
@@ -39,6 +55,20 @@ RSpec.describe YoutubeTag, type: :liquid_tag do
       expect(liquid).to include('<iframe')
       expect(liquid).to include('src="https://www.youtube.com/embed/fhH5xX_yW6U?start=300"')
     end
+
+    it "accepts YouTube ID with start time as integer and one empty space" do
+      liquid = generate_new_liquid("#{valid_id_with_time_num} ").render
+
+      expect(liquid).to include('<iframe')
+      expect(liquid).to include('src="https://www.youtube.com/embed/fhH5xX_yW6U?start=300"')
+    end
+
+    it "accepts YouTube ID with start time in seconds and one empty space" do
+      liquid = generate_new_liquid("#{valid_id_with_time_sec} ").render
+
+      expect(liquid).to include('<iframe')
+      expect(liquid).to include('src="https://www.youtube.com/embed/fhH5xX_yW6U?start=300"')
+    end
     # rubocop:enable Style/StringLiterals
 
     it "raises an error for invalid IDs or URLs" do