curl -X POST https://api.reel25.com/api/v1/folders/f1a2b3c4-.../videos \
  -H "Authorization: Bearer reel25_sk_..." \
  -H "Content-Type: application/json" \
  -d '{"video_ids": ["550e8400-...", "660f9500-..."]}'

const response = await fetch(
  'https://api.reel25.com/api/v1/folders/f1a2b3c4-.../videos',
  {
    method: 'POST',
    headers: {
      'Authorization': 'Bearer reel25_sk_...',
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      video_ids: ['550e8400-...', '660f9500-...'],
    }),
  }
);

import requests

response = requests.post(
    f'https://api.reel25.com/api/v1/folders/{folder_id}/videos',
    headers={
        'Authorization': 'Bearer reel25_sk_...',
        'Content-Type': 'application/json',
    },
    json={'video_ids': ['550e8400-...', '660f9500-...']}
)

{
  "data": {
    "added": 2,
    "alreadyInFolder": 0
  }
}