Cannot run YouTube downloads without php-curl, but php-curl isn't used in youtube-dl

[aclbandit]

Steps to reproduce

1. Deploy nextcloud:latest container (Debian-based, no longer contains php-curl)
2. Install python3-pip
3. Install youtube-dl via pip3
4. (did not install php-curl, since it's unavailable and should be unnecessary for youtube-dl)
5. Attempt to download a video via ocDownloader

Expected behaviour

Video downloads

Actual behaviour

Gets stuck on "Waiting."

cat /tmp/nohup.out 

Fatal error: Uncaught TypeError: curl_setopt(): supplied argument is not a valid File-Handle resource in /var/www/html/custom_apps/ocdownloader/SERVER/fallback.php:99
Stack trace:
#0 /var/www/html/custom_apps/ocdownloader/SERVER/fallback.php(99): curl_setopt(Object(CurlHandle), 10001, '1633720269_MC_H...')
#1 /var/www/html/custom_apps/ocdownloader/SERVER/fallback.php(34): OCD::curlSetAdvancedOptions(Array)
#2 /var/www/html/custom_apps/ocdownloader/SERVER/fallback.php(115): OCD::load('616097cd0fad4', 'https://r2---sn...', Array)
#3 {main}
  thrown in /var/www/html/custom_apps/ocdownloader/SERVER/fallback.php on line 99

A workaround is to remove line 99:

            curl_setopt(self::$CurlHandler, CURLOPT_FILE, $OPTIONS['out']);

from fallback.php (https://github.com/e-alfred/ocdownloader/blob/master/SERVER/fallback.php)

Server configuration

Operating system:
Debian 11

Web server:
apache2

Database:
MariaDB

PHP version:
8.0.11

Nextcloud version: (see Nextcloud admin page)
22.2.0

Updated from an older Nextcloud/ownCloud or fresh install:
Updated from an older

Where did you install Nextcloud from:
DockerHub

Signing status:

Signing status

No errors have been found.

List of activated apps:

App list

Enabled:
  - accessibility: 1.8.0
  - activity: 2.15.0
  - breezedark: 22.0.2
  - calendar: 2.3.4
  - camerarawpreviews: 0.7.12
  - circles: 22.1.1
  - cloud_federation_api: 1.5.0
  - comments: 1.12.0
  - contactsinteraction: 1.3.0
  - dashboard: 7.2.0
  - dav: 1.19.0
  - federatedfilesharing: 1.12.0
  - federation: 1.12.0
  - files: 1.17.0
  - files_antivirus: 3.2.2
  - files_pdfviewer: 2.3.0
  - files_rightclick: 1.1.0
  - files_sharing: 1.14.0
  - files_trashbin: 1.12.0
  - files_versions: 1.15.0
  - files_videoplayer: 1.11.0
  - firstrunwizard: 2.11.0
  - logreader: 2.7.0
  - lookup_server_connector: 1.10.0
  - music: 1.3.3
  - nextcloud_announcements: 1.11.0
  - notifications: 2.10.1
  - oauth2: 1.10.0
  - ocdownloader: 1.7.12
  - password_policy: 1.12.0
  - photos: 1.4.0
  - privacy: 1.6.0
  - provisioning_api: 1.12.0
  - ransomware_protection: 1.11.0
  - recommendations: 1.1.0
  - serverinfo: 1.12.0
  - settings: 1.4.0
  - sharebymail: 1.12.0
  - support: 1.5.0
  - survey_client: 1.10.0
  - systemtags: 1.12.0
  - text: 3.3.0
  - theming: 1.13.0
  - twofactor_backupcodes: 1.11.0
  - updatenotification: 1.12.0
  - user_status: 1.2.0
  - video_converter: 1.0.3
  - viewer: 1.6.0
  - weather_status: 1.2.0
  - workflowengine: 2.4.0
Disabled:
  - admin_audit
  - bruteforcesettings
  - encryption
  - files_external
  - user_ldap

Nextcloud configuration:

Config report

{
    "system": {
        "htaccess.RewriteBase": "\/",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
              "***REMOVED SENSITIVE VALUE***"
        ],
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "22.2.0.2",
        "overwriteprotocol": "https",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "dbport": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "mysql.utf8mb4": true,
        "dbtableprefix": "oc_",
        "theme": "",
        "loglevel": 2,
        "maintenance": false,
        "overwrite.cli.url": "***REMOVED SENSITIVE **VALUE***"**
    }
}

Are you using external storage, if yes which one (currently not supported by ocDownloader): local/smb/sftp/...
Yes, NFS mount

Are you using encryption (currently not supported by ocDownloader): yes/no
??? SSL? Yes?

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
No

ocDownloader configuration:

Which downloader are you using: Curl/Aria2
n/a -- youtube-dl. Set as curl, though.

Do you use a proxy: Yes/No
No

Which protocols do you allow:
Youtube only

Client configuration

Browser:
FireFox

Operating system:
Fedora 34

Logs

Web server error log

Web server error log

[Web server logs omitted -- can provide, but seem unnecessary]

Nextcloud log (data/nextcloud.log)

Nextcloud log

[NextCloud logs omitted -- can provide, but seem unnecessary]