Thank you for using Apple Support Communities. It's my understanding that you're unable to send pictures or videos using iMessage or text messages. I'm happy to help.
The steps in the link below can help resolve this issue:
If you can't send or receive messages on your iPhone, iPad, or iPod touch
If the behavior continues, reinstall iOS with iTunes. This can resolve possible software issues. When reinstalling iOS, iTunes will completely remove your current software and install a fresh version. While iTunes will try to do this without removing data, it's a good idea to make sure you have a recent backup before trying this step.
How to back up your iPhone, iPad, and iPod touch
Use the steps in the link below to reinstall iOS with iTunes:
If you can't update or restore your iPhone, iPad, or iPod touch
Please let us know if you're still unable to send pictures. Include any additional troubleshooting steps you may have tried.
Have a great day!