Some videos for understanding fractions:

• Describing with several representations
• More with the CCSS description for fractions

• Same numerator (Alternate Explanation)
• Same denominator(Alternate Explanation)
• Residual (Alternate Explanation)
• Transitive(Alternate Explanation)
• Compare single unit fractions (Alternate Explanation)
• Comparing numbers to 1/2

• Equivalence by splitting
• Equivalence by grouping part 1 and part 2
  

• fraction circles
• number lines