PAST TENSE VERBS: -ED in lookED (makes "t" sound)

When changing a verb to the past tense you normally add the suffix -ed to the end of the root word to make it past tense. However, the suffix -ed actually makes 3 sounds. Which sound does the -ed at the end of the verb make? In this video playlist you will learn the 3 sounds, see examples of how they are used and how to pronounce them correctly.
In this second video the -ed sound is the -ed in looked. The "ed" in this special sound doesn't make either to "e" or "d" sound. It only makes the "t" sound.
Ex.
hook-----------hooked ( 👂🏻 sounds like hook"t" )
laugh----------laughed ( 👂🏻 sounds like laugh"t" )
-ED SPECIAL SOUNDS PLAYLIST: 👇🏻
• -ED Special Sounds
VERBS PLAYLIST: 👇🏻
• VERBS
Galatians 5:9
A little leaven leaveneth the whole lump.