Finally someone has the same problem.
This is what I found to work for me:
That issue happens in DDLF2 ROM.
To fix remove YouTube from the system.
Note: You must Deodex 1st.
See: DDLF2 Deodex "Patch".
After complete removal; reflash DDLF2 (it may also be possible to just Soft Reset)
Go to Play Store and install YouTube.
Now open youtube; load a video and minimize it.
If it doesn't crash; then issue is fixed
In case you need my ROM settings:
I9003 SL - Rooted
DDLF2 - Deodexed
Matching CWM (with WiFi fix)
Please Thank button if it helped you.
Sent from my GT-I9003 using XDA Free mobile app