[bug]: Video URL Validation (youtube, gdrive etc) and file extension limitation

[sameepv21]

• [bug]: Currently the system just supports all types of video urls and file extensions.
• [bug]: For video urls, this might pose a problem because on server, we are just using youtube downloader only.
• [feat]: Need to expand to other urls as well including google drive (public), youtube etc.
• [bug]: Need to provide URL validations as well to verify the malicious url before downloading the content.