Remove deprecated YT param.
Remove deprecated YT param.

The video now always shows header etc on pause and before video starts.
However, it is currently not clickable, so the user cannot go to YT from
KS. We need to fix that.

KhanovaSkola/khanovaskola-v3,KhanovaSkola/khanovaskola-v3,KhanovaSkola/khanovaskola-v3,KhanovaSkola/khanovaskola-v3,KhanovaSkola/khanovaskola-v3,KhanovaSkola/khanovaskola-v3