Add existing videos and playlists to a YouTube show with Add content

How do you add existing videos to a show?

Go to YouTube Studio, then Content, then Shows, and choose Add content. YouTube's help says this lets you add existing videos or playlists to the show, which suits a channel with a back catalog.

The page does not say whether a video can sit in more than one show, so test it before you rely on it.

Auditing the back catalog

Before adding a pile of old videos, find the ones that fit. For a Shorts series, the rule is portrait or square and at most 180 seconds, with the playlist holding only Shorts. For a long-form show, YouTube's quality bar is the same: a consistent story or topic with good video and sound.

If the old files are in your Sume workspace, video inspect returns stills and a probe, so you can screen the shape and sound of each without opening them one by one. It reads one clip of up to 1800 seconds per call and never changes the source. Check its price in the catalog.

Filling the gaps

A back catalog rarely makes a season. You might have episodes 1, 2 and 5 of a story and need 3 and 4. Render only the missing ones with the same template as the old ones. On Sume, a Timeline render is one MP4 per call, billed at $0.10 per output minute, rounded up, and a stable Idempotency-Key per missing episode keeps retries safe.

Match the look. Reuse the voice, the caption design and the music bed from the existing episodes, or the new ones will stand out against the old.

• List what you have, with its length and shape.
• List what the story still needs.
• Render the gaps, no more.
• Add them with Add content and read the numbers afterward.

Watch the numbering

Episode order may not match your story order. Check how YouTube numbers episodes before you publish; a new episode may land after the old ones even if the story puts it in the middle. If the order matters, verify it in the Shows section.

After adding, open the Shows section and read the episode numbers top to bottom against your story outline. It is a two-minute check, and it is far easier to correct before viewers arrive than after. Keep the outline beside the numbers so a gap or a swap stands out immediately.