Merge pull request #2324 from anilgooru/release-6.6.3.a1

DO-6074 : [My Collections] When user adds a Youtube Video, we should default to resource format: Video : Implemented.
Added comments.
Merge remote-tracking branch 'upstream/release-6.6.3.a1' into release-6.6.3.a1

* upstream/release-6.6.3.a1: