I don't know if all the videos still work but here are the videos that I found by Jean Gatch. She works for the All Saints Catholic School and made these wonderful videos for her students!
Lesson 26 - The Division algorithm
Lesson 51 - Multiplying by 2 Digit numbers
Lesson 52 - Naming Numbers through Hundred Billions
Lesson 53 - Perimeters and Measures of a Circle
Lesson 54 - Reducing by group factors equal to 1, dividing fractions
Lesson 55 - Multiplying by 3 digit numbers
Lesson 57 - Probability
Lesson 58 - Writing quotients with mixed numbers
Lesson 59 - Subtracting a Fraction from 1
Lesson 60 - Finding a Fraction to complete a whole
Lesson 61 - Using letters to identify geometric figures
Lesson 62 - Estimating arithmetic answers
Lesson 63 - Subtracting a fraction from a whole number greater than 1
Lesson 64 - Using money to model decimal numbers
Lesson 65 - Decimal parts of a meter
Lesson 66 - Reading a Centimeter Scale
Lesson 67 - Writing tenths and hundredths as decimal numbers
Lesson 68 - Naming decimal numbers
Lesson 69- Fractions of a second, Comparing and Ordering Decimal numbers
Lesson 70 - Writing equivalent decimal numbers, Writing cents correctly )
Lesson 71 - Fractions, Decimals, and Percents
Lesson 72 - Area, Part 1
Lesson 73- Adding and Subtracting Decimal Numbers
Lesson 74 - Converting Units of Length
Lesson 75 - Changing improper fractions to whole or mixed numbers\
Lesson 76 - Multiplying fractions
Lesson 77- Converting units of weight and mass
Lesson 78 - Exponents and powers
Lesson 79 - Finding equivalent fractions by multiplying by 1
Lesson 80 - prime and composite numbers
Lesson 81 - Reducing Fractions - Part 1
Lesson 82 - Greatest Common Factor (GCF)
DIVE - Lesson 82 (6:47)
Lesson 83 - Properties of Geometric Solids
Lesson 84 - Mean, Median, Mode and Range
Lesson 85 - Converting Units of Capacity
Lesson 86 - Multiplying Fractions and Whole Numbers
Lesson 87 - Using Manipulatives and Sketches to Divide Fractions
Lesson 88 - Transformations
Lesson 89 - Finding a Square Root
Lesson 90 - Reducing Fractions - Part 2
Investigation 9 - Line Graphs
Lesson 91 - Simplifying Improper Fractions
Lesson 92: Dividing by two Digit Numbers
Lesson 93: Comparative Bar Graphs
Lesson 94: Using Estimations when Dividing by two digit numbers (no video)
Lesson 95: Reciprocals
Lesson 96: Using Reciprocals to divide Fractions
Lesson 97: Ratios
Lesson 98 - Negative Numbers
Lesson 99 - Adding and Subtracting Whole Numbers and Decimals
Lesson 100 - Simplifying Decimals (no video)
Lesson 101 - Rounding Mixed Numbers to the Nearest Whole Number
Lesson 102 - Subtracting Decimal Numbers Using Zeros
Lesson 103 - Volume
Lesson 104 - Rounding Decimal Numbers to the nearest whole number
Lesson 105 - Symmetry
Lesson 106 - Reading and Ordering Decimal Numbers through Ten - Thousandths
Lesson 107 - Using Percent to name part of a group
Lesson 108 - Schedules
Lesson 109 - Multiplying Decimal Numbers
Lesson 110 - Multiplying Decimal Numbers using Zeros as place holders
Lesson 111 - Multiplying Decimal Numbers by 10, by 100, by 1000
Lesson 112 - Finding the Least Common Multiple of two numbers
Lesson 113 - Writing mixed numbers as improper fractions
Lesson 114 - Problems with no solutions or many solutions
Lesson 115 - Area, Part 2
Lesson 116 - Finding Common Denominators to add, subtract and compare fractions
Lesson 117 - Dividing a decimal by a whole number
Lesson 118 - More on Dividing Decimal Numbers
Lesson 119 - Dividing by a decimal number
Lesson 120 - Multiplying mixed numbers