Add support for YouTube video embeds

Fixes #75

migrations/versions/011e42c52d21_.py

@@ -0,0 +1,25 @@
+"""empty message
+
+Revision ID: 011e42c52d21
+Revises: 6e57b2b4dcdf
+Create Date: 2022-01-25 18:48:46.367409
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = '011e42c52d21'
+down_revision = '6e57b2b4dcdf'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.add_column('package', sa.Column('video_url', sa.String(length=200), nullable=True))
+
+
+
+def downgrade():
+    op.drop_column('package', 'video_url')