YouTube
YouTube character limit and media specs
| Title | 100 characters |
| Description | 5,000 characters |
| Tags | 500 characters total |
| Video size | 256 GB or 12 hours |
| Thumbnail size | 2 MB |
Platform limits change — verify against the official docs before betting a campaign on one.
Good to know
Only ~70 title characters show in search results, and the first 157 description characters become the search snippet.
/ — over by
SawirPost's composer counts against each network's limit as you type — and when a draft runs over on YouTube, it can split into a thread at word boundaries instead of getting cut off.