Hey there Number-7,
Thanks for reaching out to the Apple Support Communities.
To get started, is this issue occurring when viewing videos in the Photos app, or a different app?
If the issue is occurring in third-party apps, give the steps listed in the following resource a try: If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open - Apple Support
Close and reopen the app
Force the app to close. Then open the app to see if it works as expected.
Restart your device
Restart your iPhone or restart your iPad. Then open the app to see if it works as expected.
Check for updates
To see if updates are available for the app, open the App Store, tap your profile icon, then scroll down to see if updates are available. If updates aren't available for the app, update the software on your iPhone or iPad.
Delete the app, then redownload it
Delete the app. When you do this, you might lose data that was stored in the app. Then redownload the app. Then check to see if the problem with the app is fixed.
While we understand that the issue is with pausing videos, the steps above can help with troubleshooting other unexpected issues as well.
Keep us updated on the results.
Take care.