What videos? What device?

Any video from any site on a galaxy note 2

if it's just videos in flash-based embedded players that malfunction, you can try this link*: https://support.mozilla.org/en-US/kb/how-do-i-watch-flash-videos-firefox-android if html5 videos don't work either your device might not support the right codecs, in which case your only option is to download the videos to your memory card and play them through a video player with "software decoding" *flash player for android is no longer supported by Adobe, it may cause problems in new versions of Android.