Fixed Generating URL issue.
Fixed UI Issues while adding youtube url.
Merge remote-tracking branch 'upstream/release-6.6.3.a1' into release-6.6.3.a1

* upstream/release-6.6.3.a1:
  Added AccessMode, Author values in search page
  "Collection progress left and right arrows issue fixed"
  "handling the null"
  "Restriction to resource format when youtube url added implemented"
  "Handling the null values"
  "Terms of use done"
Merge pull request #2393 from anilgooru/release-6.6.3.a1

Fixed Generating URL issue.