This is a really Hebrew thing to say. Hebrew speakers say stuff like this all the time, but it's probably not something you'll see in Hebrew literature. It is hard for me to find a better translation for this. You can say אני חושב עליה לפעמים which means "I think about her sometimes." Now the question is if there's difference between those two sentences?
No, he's not slurring. This is the proper way to pronounce this word. The letters ב כ פ are pronounced hard at the beginning of a word /b/ /k/ /p/, but if you add a preposition before the word, then they are pronounced soft /v/ /kh/ /f/.
So, when you have the word כמה, it's normally pronounced /kama/, but in this case, because of the added bet - בכמה becomes /bechama/. Or if you said - at the school, that would be בבית הספר, most people would say "bebeit hasefer", but the proper way to say it would be "beveit hasefer". But from my understanding, from the natives in this forum, this would be used only in formal settings.
But, interestingly, this rule is followed when verbs are concerned. You can see this in the present/past tense and infinitive. For example, בנה and בונה are pronounced bana and bone, but in the infinitive, where you add ל in front of it - לבנות it's livnot. The same would be כתב and כותב - katav and kotev, but לכתוב is likhtov. And also פתח and פותח - patakh and poteakh, but לפתוח - liftoakh.
I think he's slurring the words together. Ulpanoya has a video on this way of pronouncing words called "are Israelis even speaking Hebrew?": Yes but it's not ulpan Hebrew. You can see her explanation here: https://youtu.be/ts4r7-JpIes Make sure to read the description once you get to the video.
Thanks for that interesting video suggestion!
However, to me, he says every syllable clearly. And the post to which you're replying is only about the pronunciation of one letter, which dsjanta explains.
I don't hear any slurring of words or syllables in this recording; really, nothing equivalent to saying שֵׁשְׂרֵה instead of שֵׁשׁ עֶשְׂרֵה.
2020-10-21 rich739183 edited