My attempt before the video: the output is strange - need some help!

Your code loops for each character in new_list. On each loop, the try statement tries to remove the first instance of each vowel, but stops processing the first time a vowel is not longer present.

Given "airplane", the first pass removes one "a", one "e", one "i", then has an exception because there is no "o". The second pass removed next "a", then has an exception because there is no more "e". All subsequent passes hit the exception because there is not longer an "a'. Result: "rpln". OK.

Given "air", the first pass removes one "a", then has an exception because there is no "e". All subsequent passes hit the exception because there is not longer an "a'. Result: "ir".

The first correction: It is strongly recommended to not operate on the collection used in a for statement. In this case, you are directlly changing the list of characters new_list. While it might work in some situations, changing collection length or changing indexes has bad side effects. Better to copy list or collect the results in another list.

Ignoring the above correction, for the moment, you could fix your code by separating your try statement into multiple statements:

for vowel in new_list:
  try:
    new_list.remove('a')
  except ValueError:
    pass
  try:
    new_list.remove('e')
  except ValueError:
    pass
  try:
    new_list.remove('i')
  except ValueError:
    pass
  try:
    new_list.remove('o')
  except ValueError:
    pass
  try:
    new_list.remove('u')
  except ValueError:
    pass
  # continue # <-- continue not needed if last incode block

While this works, your code is now thrashing trying to remove vowels that are no longer there. You could check if the character under test is actually a vowel before removing:

for vowel in new_list:
  if vowel in "aeiou":
    new_list.remove(vowel)

However, this now fails, on "aire" because it still is operating on the for statement collection new_list'. This can be corrected by taking advantage of thefor ... inautomatically treating a string as a collection. Replacingnew_listwithuser_input` gives you:

print("Give me a word and I'll devowel it.")

user_input = input("> ")
new_list = list(user_input)

for vowel in user_input: # <-- changed collection to input string
  if vowel in "aeiou":
    new_list.remove(vowel) # <-- operating on created list

devoweled = "".join(new_list) 
print("{} has been devoweled to {}.".format(user_input,devoweled))

Finally, an alternative would be to simply collect the non-vowels:

print("Give me a word and I'll devowel it.")

user_input = input("> ")
new_list = [] # <-- intialized to empty list

for character in user_input: # <-- using input string
    if not character in "aeiou":
        new_list.append(character) # <-- operating on created list

devoweled = "".join(new_list) 
print("{} has been devoweled to {}.".format(user_input,devoweled))