Video playback, online video streaming, or camera recorded videos are stuttering?
Clean junk files and cache via huawei phone manager app and then wipe cache partition via recovery mode.
If still skipping frames,
1) Turn off phone.
2) boot into "recovery mode" by turning on the phone by long pressing Power + volume up simultaneously for few seconds until you see some EMUI menu.
3) navigate to "recovery mode".
4) wipe cache partition.
Note: My method might vary slightly depending on specific model, so google "how to enter p8 lite recovery mode" if my instructions do not work.
Hopefully it will fix it, without erasing any data.