HTC One M9 is unresponsive during graphics-intensive tasks

[Android Central Question]

I was watching a YouTube video (while charging) just fine at 1080p, but then the video and Youtube froze so I force-closed them and opened some games(vainglory and hearthstone). They got frozen too(only showed black screen), I thought it was odd, so I opened Youtube again. Youtube loaded, but it wouldn't play videos at high resolution (resulting in infinite loading) and when I click 144p it would play for a while then stop to buffer. However, my other apps that isn't too graphically intensive such as messages or online shopping apps works just fine, albeit a little bit slowly.

My camera opens slowly and wouldn't focus upon touch input until about 10 secs later. I've tried restarting the phone (It restarts slower than usual also) but no chance.

Could this be hardware fault? Or am I missing something here?

Thanks in advance

 

[Diamond180802]

update: as it seems like, I opened the "word cookie" game on my phone and it loaded, though it took like 1 minute to do so. After it had loaded, it worked fine. So maybe this is a memory problem?

 

[Diamond180802]

Never mind, I found out the problem, the SD card is corrupt, sorry can you delete this thread please?