fixes after review

Author: lidiazuin

modules/ROOT/pages/appendix/graphdb-concepts/graphdb-vs-rdbms.adoc

@@ -32,20 +32,20 @@ Unlike other database management systems, relationships are of equal importance
 This means you are not required to infer connections between entities using special properties such as foreign keys or out-of-band processing like map-reduce.
 
 By assembling nodes and relationships into connected structures, graph databases enable building models that map closely to a problem domain.
-Whenever you run xref:cypher-intro/cypher-sql.adoc[the equivalent of a `JOIN` operation], the graph database uses this list, directly accessing the connected nodes and eliminating the need for expensive search-and-match computations.
+With Cypher's xref:cypher-intro/cypher-sql.adoc[equivalent of a `JOIN` operation], the graph database can directly access the connected nodes and eliminate the need for expensive search-and-match computations.
 
 This ability to pre-materialize relationships into the database structure allows Neo4j to provide improved performance compared to others, especially for join-heavy queries.
 
 ifndef::backend-pdf[]
 ++++
 <div class="responsive-embed">
-<iframe width="640" height="360" src="https://www.youtube.com/embed/NO3C-CWykkY?start=294" frameborder="0" allowfullscreen></iframe>
+<iframe width="640" height="360" src="https://www.youtube.com/embed/o_6C27I5yeA" frameborder="0" allowfullscreen></iframe>
 </div>
 ++++
 endif::[]
 
 ifdef::backend-pdf[]
-link:https://www.youtube.com/watch?v=NO3C-CWykkY[Video: https://www.youtube.com/watch?v=NO3C-CWykkY]
+link:https://www.youtube.com/watch?v=o_6C27I5yeA[Video: https://www.youtube.com/watch?v=o_6C27I5yeA]
 endif::[]
 
 [#rdbms-graph-model]
@@ -59,7 +59,7 @@ image::relational-as-graph.svg[Representation of tabular data in a relational da
 
 In the relational example, on the left, you need to: 
 
-. Search the `Employees` table (potentially with millions of rows) to find the user Alice and her ID of 815. 
+. Search the `Employees` table (potentially with thousands of rows) to find the user Alice and her ID of 815. 
 . Search the `Dept_Members` table to locate all the rows that reference Alice's ID of 815.
 . Once the 3 relevant rows are found, you go for the `Departments` table to search for the actual values of the department IDs (111, 119, 181).
 . Only now you know that Alice is part of the 4Future, P0815, and A42 departments.