UNWIND $rows AS row
WITH row
MERGE (a:YoutubeAsset:YouTube {assetId: row.ASSETID})
    ON CREATE SET
        a.id = randomUUID(),
        a.isrc = CASE WHEN row.ISRC IS NOT NULL THEN row.ISRC ELSE row.VIDEO_ISRC END,
        a.name = row.TRACKNAME,
        a.createdAt = datetime(),
        a.modifiedAt = datetime()
    ON MATCH SET
        a.isrc = CASE WHEN row.ISRC IS NOT NULL THEN row.ISRC ELSE row.VIDEO_ISRC END,
        a.name = row.TRACKNAME,
        a.modifiedAt = datetime()
WITH row, a
MATCH (v:Video:YouTube {videoId: row.VIDEOID})
//soundrecording asset
FOREACH (_ IN CASE WHEN row.ISRC <> row.VIDEO_ISRC THEN [1] ELSE [] END |
  MERGE (a)-[:APPEARS_IN_VIDEO]->(v)
)
//video asset
FOREACH (_ IN
  CASE
    WHEN row.ISRC = row.VIDEO_ISRC THEN [1]
    WHEN row.ISRC IS NULL and v.isrc = row.VIDEO_ISRC THEN [1]
    ELSE [] END |
  MERGE (a)-[:IS]->(v)
)
//create connection with gsr
WITH v
  OPTIONAL MATCH (v)<-[:IS]-(:YoutubeAsset)<-[:REPRESENTS]-(gsr_represents_youtube_asset_which_is_video:GlobalSoundRecording)
  OPTIONAL MATCH (v)<-[:APPEARS_IN_VIDEO]-(:YoutubeAsset)<-[:REPRESENTS]-(related_gsr:GlobalSoundRecording)
  FOREACH(_ IN CASE WHEN gsr_represents_youtube_asset_which_is_video IS NOT NULL AND gsr_represents_youtube_asset_which_is_video.isrc = v.isrc THEN [1] ELSE [] END | MERGE (v)<-[:REPRESENTS_VIDEO]-(gsr_represents_youtube_asset_which_is_video) )
  FOREACH(_ IN CASE WHEN related_gsr IS NOT NULL THEN [1] ELSE [] END | MERGE (v)<-[:RELATED_TO_VIDEO]-(related_gsr) )